Stray mines began to turn up off the Pacific coast, imperilling commercial shipping.散逸的水雷开始在太平洋海岸出现而危及商船的航行....

v.使陷于危险，危及( imperil的现在分词 )...

imperilling的音标：imperilling的英式发音音标为：[ɪmpe'rəlɪŋ]imperilling的美式发音音标为：[ɪmpe'rəlɪŋ]...