ditching test水上: water; overwater; water born ...降落: descend试验: experiment; test; trial水上降落: landing on water; water landing水上降落点: splash point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:水上降落试验，即可在微信中查询翻译
