draw aculedraw acute锐角: acute angle; closed angle; o ...下旋球: back spin; back/under spin; backspin underspin; backspinn; draw; underspin下旋球（后旋球）: back spin发急下旋球: quick backspin service; reverse serve发下旋球: backspin serve; backspin service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:锐角下旋球，即可在微信中查询翻译
