So this is moles per liter per second, right? It's disappearance of some concentration for time.

所以这里的单位是摩尔每升每秒，对吗？这代表浓度随着时间的减少。

youdao

From the moment the second child is born (or right away if you have twins) SPEND TIME WITH EACH child ALONE.

从第二个孩子出生开始，你要花时间单独和每个孩子相处。

youdao

When I actually try something and fail, I generally get right back up and do it again, but better the second time.

当我确实试着做了一些事情，失败了，我通常会从原地爬起来，再做一次，但第二次就会做得好一些。

youdao

This is my second time here at Fisher House right around the Easter holidays, but it's not my second time, period.

WHITEHOUSE: The White House

Just a minute later, Ronaldo popped up to put Portugal in the lead for the second time with a sharp right-foot effort from just inside the penalty area after Deco cut inside and slid the ball into his path.

CNN: Ronaldo puts Portugal into quarterfinals

We also learn from how Bill got it right the second time around.

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