Meadow voles do not form pair bonds.
草原田鼠却不会结成配偶。
What you used to do is, every six months you'd pull out your bonds and you'd clip the coupons with a pair of scissors; you take them to a bank and they would give you cash for your coupons.
过去，你每六个月从你的债券上，用剪刀剪下息票，把它拿到银行，用息票兑换现金。
So, using our simple valence bond theory, what we would expect is that we want to pair up any unpaired electrons in methane with unpaired electrons from hydrogen and form bonds.
利用简单的价电子成键理论，我们预计，要把所有甲烷中没有配对的电子，和氢原子中没有配对的电子配对来形成键。
The hyperconjugation between lone-pair of nitrogen atoms and nitrogen-nitrogen bonds, or among nitrogen-nitrogen bonds play a significant role on the nitrogen-nitrogen bond length.
氮原子孤对电子与氮氮键以及氮氮键相互之间的超共轭作用是影响氮氮键长的重要因素。
The hyperconjugation between lone-pair of nitrogen atoms and nitrogen-nitrogen bonds, or among nitrogen-nitrogen bonds play a significant role on the nitrogen-nitrogen bond length.
氮原子孤对电子与氮氮键以及氮氮键相互之间的超共轭作用是影响氮氮键长的重要因素。
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