L-9：like water off/on a duck's back 毫无效果
A:His parents and teachers scolded Peter, but it was like water off a duck's back.
A:彼得被他的父母和老师狠狠地骂了一顿，但是效果不彰。
B:The criticism fell on deaf cars.
B：批评被当成了耳旁风。
A:He's beyond help.
A:他是不可救药了。
B:We should try our best to help him.
B:我们得尽力帮他。
