第1个回答 2010-10-06
trying out best to
第2个回答 2010-10-06
trying very hard to
第3个回答 2010-10-06
We are trying to understand the old man's words.
希望能帮到你。
第4个回答 2010-10-06
trying very hard to
We are trying very hard to understand the old man's words.
第5个回答 2010-10-06
trying our best to
楼上的写正确点