premium /'primm/ n. 保险费点击收听音频跟读 ↓↓↓ ↓↓↓ ↓↓↓例句/词组:a monthly premium of 6.25 每月 6.25 英镑的保险费 英语解释：an amount of money that you pay once or regularly for an insurance policy 保险费

301. might 熟义：或许I sue all my might to open the door. n.力量，权威302. mind v.当心,注意{熟义:介意；心(思)}Mind your head！当心！不要碰着头了。303. minute 熟义：n. 分钟They held a minute inspection of the grounds. adj.微小的，详细的，仔细而准确的。Plea

L251．let down 辜负，使失望（熟义：放下来）He said he would be here by 12o'clock， but he let us down．他说他12点钟之前就到，但他让我们失望了。252．let out 泄露（机密）；发出（声）；出租（熟义：让出去）I'll never tell you another secret if you let this on