那个罪犯被关进牢里以后,才开始反思自己的行为。Nà ge zuìfàn bèi guān jìn láo li yǐhòu, cái kāishǐ fǎnsī zìjǐ de xíngwéi.Only after the criminal was put in prison did he begin to reflect on his actions.
这把锁很牢,小偷根本打不开。Zhè bǎ suǒ hěn láo, xiǎotōu gēnběn dǎ bu kāi.This lock is very sturdy; thieves can't open it at all.
请把这些单词牢牢记在心里,明天要考试。Qǐng bǎ zhèxiē dāncí láoláo jì zài xīn li, míngtiān yào kǎoshì.Please keep these words firmly in mind; there's an exam tomorrow.