All attempts by the experts to cure him failed.

专家们治疗他的所有努力都失败了。

The town is banning plastic bags in an attempt to help the environment.

为改善环境，这个城镇禁用塑料袋。

The team made an attempt to climb / at climbing the mountain.

这个队尝试着爬上那座山。

He made no attempt to hide his feelings.

他毫不掩饰自己的情感。

He did not attempt the last question in the examination.

在考试中他放弃了最后一道题。