at the right momentætðəraitˈməumənt短语⁶⁰²⁴² 基本例句 adv.在适当的时候 The arm movement can only be executed correctly when the body skims the water surface in a wave-like fashion and the arms stroke and start their recovery at the right moment. 手臂的运动，才能被执行正确的身体掠过水面表面波浪状的时尚和武器中风和开始恢复正好。 xmswim