他还不敢肯定这件事是否值得去做的翻译：He was not sure if this thing is worth doing 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

He also was not sure whether this case is worth doing

He was not sure if this thing is worth doing

He does not dare to affirm whether this matter is worth doing

He was not sure whether or not this thing is worth doing

He was not sure if this thing is worth doing