underwateradj.在水中生长的；水下的adv.在水下underwater plow水下开沟犁underwater race潜泳比赛underwater line水下线,水下管线underwater body水下体underwater slope水下边坡underwatertunnel水下隧道underwater shaft水下竖井underwater stake水中桩基underwater cable海底送电线,水下电缆underwater noise水下噪声