to tell on
01
告发, 打小报告
to give away information one has obtained about someone, particularly to someone in authority
例子
Do n't tell on me! I'll share my candy with you if you keep it a secret.
别告发我！如果你保守秘密，我会和你分享我的糖果。
02
影响, 对...造成影响
(of an experience or a period of time) to affect someone, often in a negative way
例子
Long hours of studying began to tell on his performance in school.
长时间的学习开始影响他在学校的表现。
