賴世雄教你輕松說英語Unit 320 Im not SUre ifthis will work．我不確定這個(gè)是否可行。
I don't know if it is a good idea.
I'm not sure if this will work.
There is no harm in trying.
I'm not sure if this idea will work.
I'm not sure if this plan will work.
I think the proposal can work.
There's no harm in helping a person in need.
