The second input is a firmer pull on the upper wing, in this case with the left hand.

第二个输入动作是一个更加坚定果断的对上翼的拉，在这个例子中是用左手。

youdao

So after the initial pull, focus on turning the knuckles of your left hand down.

所以在开始拉动后，关注左手指关节转动向下。

youdao

The next input coming up is pull on what was the lower wing with the right hand( in this position it's the wing to the left).

紧接着的下一个输入动作是拉刚刚的下翼（以现在的姿态看是左侧机翼）这个例子用右手。

youdao

So if you've ever seen or used an old school typewriter, you might recall that when you're typing something out on an old mechanical typewriter, - when you like hit the char-- when you hit the enter key to move the head back to the left hand side to the next line or you would pull down some lever, it was really a two part process.

如果你们有谁曾经看过或用过老式打字机，可能还记得，当你在,这种老式打字机上打字的时候，当你-,敲入回车键，跳转到,下一行的最左边，或者,拉一下杆，这个需要两步走。

哈佛公开课 - 计算机科学课程节选

Then and only then would he reach down with his left hand into his left suit jacket pocket and pull out a stack of note cards.

FORBES: A Few Notes on Notes - Media Training