25wt% twenty five weight percent 150%C one fifty degree C one two thirds 4/5 four fifths/ four over five one point two three 0.0l 2.X two point something identically equal to larger tha is much greater than a=b+c a is equal to b plus c a=b-c a is equal to b minus c a=bxc a is equal to b times c/a is equal to b multiplied by a is equal to b divided by c/ a is equal to b over c x square/x to the second power/x to the power two x cube/x to the third power /x to the power three log x to the base n a prime a double prim is perpendicular to is parallel to 与听众的交流 ☆当听众打断你的报告,问及某个问题时 如你在后面的片子会讲到 I will show you later. I will show you on the following slides I am on the way 如你在报告中不会涉及 It is an interesting question. Can I answer you question after I finish my presentation? ☆当主持人提醒时间快到了时 I'm going to be quick5 25 wt% twenty five weight percent 150 ºC one fifty degree C 1/2 one half 1/3 one third 2/3 two thirds 4/5 four fifths/ four over five 1.23 one point two three 0.01 zero point zero one 2.X two point something = is equal to / equals is identically equal to is approximately equal to > is larger than < is less than >> is much greater than a = b + c a is equal to b plus c a = b - c a is equal to b minus c a = b x c a is equal to b times c / a is equal to b multiplied by c a = b/c a is equal to b divided by c / a is equal to b over c x 2 x square / x to the second power / x to the power two x 3 x cube / x to the third power / x to the power three lognX log x to the base n a* a star a’ a prime a’’ a double prime is perpendicular to // is parallel to z 与听众的交流 当听众打断你的报告 问及某个问题时 如你在后面的片子会讲到 I will show you later. I will show you on the following slides. I am on the way. 如你在报告中不会涉及 It is an interesting question. Can I answer you question after I finish my presentation? 当主持人提醒时间快到了时 I’m going to be quick