1.a number of 许多的；一些

A number of foreign governments condemned the army coup.
一些外国政府谴责马里发生的军事政变。

He masterminded a number of terrorist attacks.
他谋划了许多次恐怖袭击行动。

2.result in 引起，导致，以…为结局

A declining population would result in economic stagnation.
人口数量逐渐下降可能导致经济停滞。

Eye damage can result in temporary or permanent blindness.
眼睛损伤能造成暂时失明或永久失明。

3.reply to 回复， 回答

The companies didn't reply to emails seeking comment.
两家公司均未回复请求置评的电子邮件。

If left unchecked, many workers might reply to emails all day.
如果不受约束的话，许多员工或许整天都在回复电子邮件。

4.tend to 朝某方向；趋向；偏重

Smaller laptops also tend to have longer battery life.
小巧的电脑也趋向更长的电池持续时间。

I tend to prefer light colors.
我往往更喜欢淡颜色。