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B-24：bend over backward 竭尽全力地去做

A:Do you know Mark?
A:你认识马克吗？

B:Yeah! He is a nice guy. He is very helpful and always bends over backward to help those who are in need of help.
B：认识，他是好样儿的，他总是乐于帮助那些需要帮劝的人。

A:Can you introduce him to me?
A:你能介绍我认识他吗？

B:Sure.
B：当然可以。