有时候把所有事情放一边，穿上一双好鞋然后出门，是一个去除心烦意乱，腾出时间来进行集中学习的好方法。

Sometimes just dropping everything, putting on a good pair of shoes, and heading out the door can be the surest way to cut the distractions and free up time for focused learning.

youdao

描述在与IPv 4网络共存情况下实施IPv6的技术要求(包括协议放式，双栈方式，隧道方式)。

Describe the technological requirements for running IPv6 in conjunction with IPv4 (including: protocols, dual stack, tunneling, etc).

youdao

再次，设计实现了基于微扰小环和垂直叠放结构的微带双模双通带带通滤波器。

Thirdly, a dual-mode dual-band bandpass filter with rectangular-loop perturbation and stacked structure is presented.

youdao

But since in drawing Lewis structures actually, in some cases you do, you can draw a dotted line that means a 1 and 1/2 bond, but most in most cases, we just draw out both resonance structures, and the way that we say it's a resonance structure is that we put it in the brackets and we put an arrow between it.

但是由于在画路易斯结构时,其实，在某些情况下是可以的，你可以画一条虚线来表示一又二分之一键，但是在多数情况下，我们就把两个结构都画出来，而我们说这是一个共振结构的表示的方法是,把它们放在括号里，并在中间放一个双箭头。

麻省理工公开课 - 化学原理课程节选