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1·If left unchecked, weeds will flourish.

如果不加遏制，杂草就会疯长。《柯林斯英汉双解大词典》

2·The fire was allowed to burn unchecked.

大火肆虐，不受控制。《牛津词典》

3·The rise in violent crime must not go unchecked.

暴力犯罪的增长必须加以制止。《牛津词典》

4·The plant will soon choke ponds and waterways if left unchecked.

如不控制这种植物的生长，池塘和水道很快就要被阻塞。《牛津词典》

5·If such practices are unchecked, half the species in the Coral triangle will continue to disappear at a rate of 1-2% a year.

如果这些行为不加以制止，那么珊瑚三角区内一半的物种将以每年1-2％的速度继续消亡。

6·Ogbeh says experts are investigating how to control the pest's damage and prevent its spread, which has gone largely unchecked until now.

奥格贝说，专家们正在研究如何控制这种害虫的危害，并防止其蔓延，直到现在，这种情况基本上还没有得到控制。

7·One should not let bad behaviour go unchecked.

对错误的行为， 不能放任不管。《新英汉大辞典》

8·Add topology to palette: unchecked.

向配置板添加拓扑图：unchecked。

9·Compression - Unchecked by default.

压缩——在默认情况下没有启用。

10·By default, this option is unchecked.

在默认情况下，这个选项没有启用。