1·They took refuge in a bomb shelter.
他们在一个防空洞里避难。
—— 《柯林斯英汉双解大词典》
2·Several neighbors hope to find safety in the only bomb shelter on their street when on announcement comes over the radio that enemy missiles are approaching.
当从无线电发出敌人导弹即将来临时，几个邻居希望在他们的街上能在那个唯一的防空洞里找到安全的地方。
3·Like a bomb shelter.
象一个防空洞。
4·Everybody quickly went to the bomb shelter when the alert sounded.
防空警报响起时，大家都快速进了防空洞。
5·In case of an air attack, low down and creep quickly to the nearest bomb shelter.
万一遇到空袭，应该迅速趴下并匍匐至最近的防空洞。