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。
