Because step five is that we need to fill in our bonding electrons, and we start it with filling in two electrons per bond.

因为第五步要做的是将我们的成键电子填在这，所以我们开始在每个键处填上两个电子。

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When it comes to computers, any hardware over two years old is considered middle-aged and anything over five years is considered ancient.

谈到计算机，任何两年前的硬件都已经被当成是中世纪古董，而超过五年就已是远古化石了。

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It is composed of five events: pistol shooting, fencing, horseback riding, running, and swimming. The pentathlete's goal is to succeed in all five areas, not just one or two.

五项运动包括手枪射击、击剑、骑马、赛跑及游泳，运动员的目标是要五项皆有卓越表现，而非只擅长于其中一、两项。

youdao

Because step five is that we need to fill in our bonding electrons, and we start it with filling in two electrons per bond.

因为第五步要做的是将我们的成键电子填在这，所以我们开始在每个键处填上两个电子。

麻省理工公开课 - 化学原理课程节选

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It is anxious to secure a stronger five-year mandate and regain a longtime two-thirds legislative majority that it lost in 2008.

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