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1·Consequently, the survival rate of lobster larvae must be going up, and the lobster population in Foerkland's coastal waters is bound to increase.

因此，龙虾幼虫的存活率必然会提高，而福岛沿岸水域的龙虾数量也必然会增加。

2·He must be going soft in the head.

他一准是脑子出毛病了。《牛津词典》

3·I must be going now.

我现在得走了。《牛津词典》

4·I must be going home; it's way past my bedtime.

我得回家了，早过了我的就寝时间了。《牛津词典》

5·They've had a continuous three-year rise in revenue, so things must be going well.

他们的收入已经连续增长三年，所以情况一定很好。

6·I must be going back at once.

我得马上回去。《新英汉大辞典》

7·I must be going now. See you.

我现在得走了。再见。

8·I I guess I must be going now.

我想我现在得走了。

9·I'm afraid I must be going now.

恐怕我现在得走了。

10·Jack must be going on forty.

杰克肯定是奔四十的人了。