However, when something does go wrong then a number of problems can arise.

但是当故障出现时，一些问题就会随之产生了。

youdao

First, a folder object must be created, and then a number of attributes must be set on the folder, including the item class (if folder item classes are supported).

首先，必须创建一个Folder对象，然后必须在文件夹上设置许多性质，包括条目类(如果支持文件夹条目类的话)。

youdao

Some Web sites require passwords with numbers and letters, others require numbers, letters and special characters, and still others require a capital letter, a lower-case letter and then a number.

一些网站的密码由数字和字母组成，另一些必须是数字、字母和特殊符号的组合，还有一些必须有一个大写字母，小写字母和数字组成。

youdao

But there were a number of international developments then which involved the United States.

VOA: special.2010.07.01

And then hash character takes in any string or character, single character, gives me back a number. Notice what I do.

然后哈希接受任何字符串或字母，单个字符,返回给我一个数字，注意我要做什么。

麻省理工公开课 - 计算机科学及编程导论课程节选

And if it is going to be a standing wave then this must be an integral number of wavelengths.

如果这有个驻波的话,那么周长就是个整数。

麻省理工公开课 - 固态化学导论课程节选

Since then a number of claims have been fought out in court, or settled, according to their particular circumstances.

BBC: Former Barlinnie inmates win slopping out court ruling

Since then a number of high-profile figures from the regime have been convicted, including the de facto presidents Jorge Videla and Reynaldo Bignone.

BBC: Largest trial of 'Dirty War' crimes starts in Argentina

Mr Sleaford went on the run from police for 11 days - travelling first to his aunt's house in Newcastle then a number of addresses in Lincolnshire.

BBC: Janusz Smoderek