1.try to do 试着做某事,努力了但不一定成功
You must try to be more careful.
你可要多加小心.
try doing 尝试做 所谓尝试就是试试看,不一定怎么努力的
I tried gardening but didn't succeed.
我试着种果木花卉,但未成功.
2.It's pleasure =My pleasure 用在做某事之后,表示不用谢
比如----thanks for helping me!
----My pleasure /It's pleasure
With pleasure是用在做某事之前,表示很乐意
比如----cao you give me a glass of water?
----With pleasure
3.on the top另外；熟练掌握；在…之上；紧接着
Stay on top of new ingredients and new product technologies applicable.
学习食品原料及产品新技术并使之能够应用产品里.
on the top of 在……顶部 on the top of the mountain 在山顶上