失守的英文：
fall

参考例句：

One after another the Italian bases in the desert fell as the retreat turned into a rout.
当撤退转变为溃败时，意大利在那个沙漠中的基地接连失守。

fall是什么意思：
v. 落下；倒塌；摔倒；下降；减弱；阵亡
n. 摔倒；下降；秋天；垮台；陷落；瀑布
adj. 秋天的

Sleet is falling.
天上下起了冰雹。

fall into disfavour
失宠失众望

We observed the barometer fall. [The barometer was observed to fall.]
我们看见晴雨表下降。

All the expenses fall on me.
全部费用由我支付。

There was a light rain falling.
外面下着小雨。