lift ring pull up and back
拉环拉回来
拉起环，向上并向后拉。这是在讲怎样打开易拉罐。
n. 戒指，指环; 铃声，钟声; 环形物; 拳击场;
vt. 形成环状; 环绕; 使（例如铃）响; 打电话给;
vi. 按铃，敲钟; 回响; 成环形;
pull-up英 [ˈpʊlˌʌp] 美 [ˈpʊlˌʌp] 名词拉起动作，引体向上
1. Whether it`s his 81-point game, his electrifying dunks, his pull-up jumpers, or even his ball-hawking defense, Bryant has it all, and he can come at you with any of this on any given night.
无论在他的81分，他的劲爆扣篮，他的拉杆跳投，甚至于他的卖力防守，科比在任何夜晚，都可以靠这些中的任何一样来摧毁你。
2.There are two forms of techniques in the techniques of pull-up/ chinning.
前言 引体向上有两种技术形式：一种为静止发力向上拉起，另一种为摆动发力向上拉起。
3. Pull-up resistors or active components that are only used to sustain a signal state.
上拉电阻器或者仅用来保持信号状态的组件。
4. Also, if the driver stage is an active totem-pole output, the Schottky diode allows the active output pull-up section to disconnect from the LED and pull high.
同样，如果驱动级是有源的图腾柱输出（totem-pole output），肖特基二极管允许有源输出的上拉但却截断了LED的联系。