寄生菌除了靠寄主为生时以外,在许多情况下就不能生存 Condensed formulas are usually used by organic chemists except when the structural features are being stressed. 除了强调结构特点时以外,有机化学工作者通常使用分子简式 He has always been in good heal th except that he has had a slight headache in the past few days 除了过去几天来轻微头痛外,他的身体一直很健康 n a sense在某种意义上 What you say is right in a sense.在某种意上,你说的对 13.07 be starved to death饿死。如 If the host plant is not present in the field, in a sense the parasite will be starved to death.如果田间沒有寄主植物,在某种意上来说,寄生菌就要饿死 13.08 come along快来,出现,进展,进步。如: Come along!快来!(祈使句,表示鼓励) Some parasites may come along again。有些寄生菌可能再出现。 Our whole cultural and educational undertakings is coming along vigorously 我们整个文化教育事业正在蓬勃发展 13.09 wait for等,等候,等待。如: Don' t wait for me!别等我! At this time tomorrow I shall be waiting for you in the railway station 明天这个时候,我在火车站等待着你 13.10 wait for sb. or sth. to do sth.为一习惯用法。如 Some parasites take years to die, and they may have resting spores in the soil waiting for the susceptible crop to come along.有些寄生菌需要几年才死,他们可能在土壤里有休眠孢子,等待易感病 庄稼来临 I am waiting for him to come.我正在等他来 13. 11 have a… knowledge of知道,了解,懂得。如 Both these preventative measures illustrate the importance of having a sound knowledge of the parasites attacking crops 这两顶预防措施说明了充分了解危害作物的寄生菌的重要1 He has a perfect knowledge of English。他精通英语。 13.12 free from或 free of无。。。的,没有。。的,免于。。的。如: The seed must be free from disease.种子必须是无病的。 These machine parts are free from defects.这些机器零件没有缺陷 13. 13 not by o means 决不。如: These goods are by no means satisfactory.这些货物决不令人滿意。 We have ideals, but we are by no means visionaries. [ 'vi 3 a, neri 我们有理想,但我们决不是空想家。 13. 14 For some years plant breeders concentrated on what is called single or ma jor gene resistance. 若干年来,植物育种者集中注意所谓单一的、即主要的基因抗性 concentrate on(或upon)专心于,钴研。如 You should concentrate on your work.你应该专心致志于你的工作。 You will solve the problem if you concentrate upon 如果你肯贯注全部精神,你会解决这个问题 13.15 no longer不再,已不。如: He is no longer living here.他已不住在此处 I can wait no longer.我不能再等待了 13.16a。a。 range of。。 行,一。。。列,一。。系列。词组如: a magnificent range of mountains一条巍巍壮丽的山脉 a long range of cliffs一长列绝壁 a wide range of meadows一在片草地 ide range of fungi各种真菌 13 17 Breeding programs are now concentrating on multigene or field resistance which means that a variety has the characteristics to tolerate infection from a wide range of races with little lowering of yield.寄生菌除了靠寄主为生时以外，在许多情况下就不能生存。 Condensed formulas are usually used by organic chemists except when the structural features are being stressed. 除了强调结构特点时以外，有机化学工作者通常使用分子简式。 He has always been in good health except that he has had a slight headache in the past few days. 除了过去几天来轻微头痛外，他的身体一直很健康。 13.06 in a sense 在某种意义上。如： What you say is right in a sense. 在某种意上，你说的对。 13.07 be starved to death 饿死。如： If the host plant is not present in the field, in a sense the parasite will be starved to death. 如果田间沒有寄主植物，在某种意上来说，寄生菌就要饿死。 13.08 come along 快来，出现，进展，进步。如： Come along! 快来！(祈使句，表示鼓励) Some parasites may come along again。有些寄生菌可能再出现。 Our whole cultural and educational undertakings is coming along vigorously。 我们整个文化教育亊业正在蓬勃发展。 13.09 wait for 等，等候，等待。如： Don't wait for me！别等我！ At this time tomorrow I shall be waiting for you in the railway station. 明天这个时候，我在火车站等待着你。 13.10 wait for sb. or sth. to do sth. 为一习惯用法。如： Some parasites take years to die, and they may have resting spores in the soil waiting for the susceptible crop to come along. 有些寄生菌需要几年才死，他们可能在土壤里有休眠孢子，等待易感病 庄稼来临。 I am waiting for him to come. 我正在等他来。 13.11 have a … knowledge of 知道，了解，懂得。如： Both these preventative measures illustrate the importance of having a sound knowledge of the parasites attacking crops. 这两顶预防措施说明了充分了解危害作物的寄生菌的重要性。 He has a perfect knowledge of English。他精通英语。 13.12 free from 或 free of 无。。。的，没有。。。的，免于。。。的。如： The seed must be free from disease. 种子必须是无病的。 These machine parts are free from defects.这些机器零件没有缺陷。 13.13 not by any means = by no means 决不。如： These goods are by no means satisfactory.这些货物决不令人滿意。 We have ideals, but we are by no means visionaries. [‘viзa,neri:] 我们有理想，但我们决不是空想家。 13.14 For some years plant breeders concentrated on what is called single or major gene resistance. 若干年来，植物育种者集中注意所谓单一的、即主要的基因抗性。 concentrate on (或 upon) 专心于，钻研。如： You should concentrate on your work.你应该专心致志于你的工作。 You will solve the problem if you concentrate upon it. 如果你肯贯注全部精神，你会解决这个问题。 13.15 no longer 不再，已不。如： He is no longer living here. 他已不住在此处。 I can wait no longer. 我不能再等待了。 13.16 a 。。。range of 。。。 一。。。行，一。。。列，一。。。系列。词组如： a magnificent range of mountains 一条巍巍壮丽的山脉 a long range of cliffs 一长列绝壁 a wide range of meadows 一在片草地 a wide range of fungi 各种真菌 13.17 Breeding programs are now concentrating on multigene or "field resistance which means that a variety has the characteristics to tolerate infection from a wide range of races with little lowering of yield