1、It was not known what caused the ship to sink and no distress call had been made, the center said.
目前還不清楚船下沉的原因，沒有收到遇險信號，該中心表示。

2、Master: Cargo shifting in the hold! Broadcast a distress call on VHF.
船長：貨艙內(nèi)貨物移動。通過甚高頻播發(fā)遇險信號。

3、Lucy's distress call was heard by the corvette.
驅(qū)潛快艇聽到了露西的呼救信號。

distress call翻譯