9 times 10 to the 15 per second. So if you remember what the equation Balmer found was this number multiplied Balmer but just now starting from understanding the difference between energy levels.
等于3。29乘以10的15次方每秒,所以如果你们记得的话,找到的那个方程就是乘以了这个数，by，this，here。，So，，we，found，the，exact，same，equation，所以我们从理解不同能级之间,能量差出发找到了同样的方程。
Starting from this week, all kindergartens and schools should conduct safety check on drinking water machines for a second time.
由本周开始，所有幼儿园和学校应进行安全检查饮水机第二次。
The annual administration fees for this package, starting from the second year: $650 .
在此封装的年度管理费 ，从第二年起：650元 。
The annual administration fees for this package, starting from the second year: $650 .
在此封装的年度管理费 ，从第二年起：650元 。
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