watermark船: boat; ship; vessels水线: waterline; shoreline上部: headpiece; ridge船水线上部被油等污染的痕迹: watermark船水线上部被油等污染的痕迹;水位标志: watermark下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:船水线上部污痕,即可在微信中查询翻译