balkline起跳: take off线: thread; string; wire跑向起跳线: run-up【运】起跑线,起跳线,投掷线。: scratch line跳线: wire jumper; jumper; bridle wire; jumper wire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:起跳线,即可在微信中查询翻译