formal:a..official;very correct and suitable for official or important occasions正式的：i适合正式 场合的 e.g.The company has offered me the job,but I don't yet have a formal contract. 公司录用了我，不过还没正式签合同。 tinkerwith::keep moving or touching(sth.)esp.while doing repairs or making sth..反复摆弄，捣 e.g.My father is in the garage tinkering with his bike. 我父亲在车库捣鼓他那辆自行车。 encouragement::n.鼓励 e.g.I could never have achieved such great success without the encouragement from my family and colleagues. 没有家人和同事的鼓励，我根本不可能取得这么大的成功。 interact with:与…相互交流 e.g.Humans interact with their environments in many ways 人以诸多方式与环境相互影响。 boom:vi.have a period of rapid growth;become bigger,more successful,,etc.迅速发展：繁荣昌 e.g.The fim/movie industry in our country is booming 我国影业迅速发展。 ain ground:取得进展 Naturalpersonal care products are gaining ground in the UK. 天然护理用品在英国流行起来。 capacity::n.the ability todoor understand sth..办事（或理解）能力 e.g.Itseems to be beyond his capacity to finish this task. 看来他没有能力完成这项工作 define::t.解释：给…下定义 e.g.It is hard to define beauty,but you can tell it when you see it. 很难给美下定义，但看到美的事物你就知道那是美的。 physical:a..有形的：实物的 e.g.Some people wonder whether the physical world exists,or whether it is all one great illusion.2 formal: a. official; very correct and suitable for official or important occasions 正式的；适合正式 场合的 e.g. The company has offered me the job, but I don’t yet have a formal contract. 公司录用了我，不过还没正式签合同。 tinker with: keep moving or touching (sth.) esp. while doing repairs or making sth. 反复摆弄，捣 鼓 e.g. My father is in the garage tinkering with his bike. 我父亲在车库捣鼓他那辆自行车。 encouragement: n. 鼓励 e.g. I could never have achieved such great success without the encouragement from my family and colleagues. 没有家人和同事的鼓励，我根本不可能取得这么大的成功。 interact with: 与…相互交流 e.g. Humans interact with their environments in many ways. 人以诸多方式与环境相互影响。 boom: vi. have a period of rapid growth; become bigger, more successful, etc. 迅速发展；繁荣昌 盛 e.g. The film/movie industry in our country is booming. 我国影业迅速发展。 gain ground: 取得进展 Natural personal care products are gaining ground in the UK. 天然护理用品在英国流行起来。 capacity: n. the ability to do or understand sth. 办事（或理解）能力 e.g. It seems to be beyond his capacity to finish this task. 看来他没有能力完成这项工作。 define: vt. 解释；给…下定义 e.g. It is hard to define beauty, but you can tell it when you see it. 很难给美下定义，但看到美的事物你就知道那是美的。 physical: a. 有形的；实物的 e.g. Some people wonder whether the physical world exists, or whether it is all one great illusion