[误] An experienced teacher once said that before class he felt as if faced with a formidable enemy, in class he felt like walking on ice, and only after class would he feel relieved.
[正] An experienced teacher once said that before class he felt as if faced with a formidable enemy, in class he felt like walking on eggs, and only after class would he feel relieved. 注：中文的“如履薄冰”是比喻一个人“做事十分小心谨慎或战战兢兢”，而英语的类似说法却是 walk on eggs 或 tread on eggs，要注意中英文喻体的不同。
