I think I'll need your expert assistance this afternoon.
我想,我今天下午需要你专业的协助。
If you're sure you're not in a hurry, I can use a little help.
如果你真的不忙的话,我可能要你帮个小忙。
My dear friend, Mathilde. Let me tell you something. That necklace you borrowed from me wasn't a real diamond necklace. It wasn't valuable at all. The stones in the necklace were made of glass. It was worth five hundred francs at the most.