bascule movement弹: shoot; catapult摆: put; arrange; set in order运动: arrange things or get things ...摆运动: pendular motion; pendulum motion复摆运动: compound pendulum motion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:弹摆运动，即可在微信中查询翻译
