Atomic orbital electron density Self-charge, the charge kept by the atoms involved in the bond Active charge, the charge not inv... 本人是新手,对MOPAC不太了解,想知道下面这几个怎么算出来,请大家帮忙!
That’s still the case, but now the company is offering three months of free service, and waiving the activation charge, for each additional radio you buy. 现在，这种情况并未改变，但公司对购买了一部以上收音机的用户提供三个月的免费服务，并且免收初装费。
The office has been humming with activity. 办公室一直忙着搞活动。
The threat of war has depressed business activity. 战争的威胁使经济萧条。
There has been a lot of activity in the town today. 今天市中心相当热闹。
The town was humming with activity. 该市镇生气勃勃，呈现一片热闹的景象。