1.今晚没有必要把所有的实验做完.
It'snotnecessary/unnecessarytofinishalltheexperiment.tonight.
2.离开实验室时一定要把电源关掉.
Makesurethatallthelightshavebeenturnedoffwhenyouleavethelab.
3.以我的看法,这本书值得一读.
Inmyopinion,thisbookisworthreading.
4.毫无疑问他是这份工作最好的人选.
Itgoeswithoutsayingthatheisthemostsuitablepersonforthejob.
Withoutdoubt,Heisthemostsuitablepersonforthejob.
5.事实证明爱因斯坦是一位杰出的科学家.
FactshaveprovedthatEinsteinisanoutstandingscientist.