1) I felt that she was very weak.
我觉得她很虚弱。
2) I feel I am in emptiness.
我觉得我很空虚。
3) I was very tired and weak.
我很累，很虚弱。
4) She was weak after her illness.
她病后很虚弱。
5) She was still weak after her illness.
她病后仍很虚弱.
6) She has a very weak constitution.
她体质很虚弱。
参考词条