At full reach and without dropping your elbow, feel like you are tipping your finger-tips over the front of a barrel (again flexing at the wrist), which will start the catch.
在完全前够并且没有沉肘的时候，感觉好像你把你手指点到了一只枪管的前段（再收一点手腕），这就是抓水的开始。
In therory the amount of tips is optional, but in many places of Ameica, there are some unwritten rules on tipping.
理论上小费给多少纯属自愿，但是在美国，不少地方都有不成文的规矩。
In therory the amount of tips is optional, but in many places of Ameica, there are some unwritten rules on tipping.
理论上小费给多少纯属自愿，但是在美国，不少地方都有不成文的规矩。
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