4.go beyond/over the limit超过限度

within limits在一定程度内

set a limit to sth对某事(物)加以限制limit...to...把……限定在……范围内

limited adj.有限(制)的

be limited to sth受限于某事

5.convince sb of sth使某人相信某事convince sb to do sth说服某人做某事convince sb+that从句使某人确信……convinced adj.坚定不移的;有坚定信仰的

be convinced of sth/that相信……convincing adj.令人信服的

6.in ruins成为废墟

bring sb to ruin使某人失败; 使倾家荡产bring ruin upon oneself自取灭亡

come/fall/go to ruin毁灭,灭亡; 崩溃; 破坏掉be the ruin of成为……毁灭/堕落的原因

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