You should remember that you are free to say no to your friends if they ask too much.

如果你的朋友要求太多的话，你要记住，你有对他们说不的自由。

youdao

Sometimes it is necessary to say no.

有时候说“不”是必要的。

《柯林斯英汉双解大词典》

We should dare to say no.

我们要敢于拒绝。

youdao

Zyuganov says protesters on that holiday first of all want to say no to mediocre reform, which he characterizes as a betrayal of the Motherland.

VOA: standard.2009.03.20

0 And we'll also see backslash 0 which is actually the special character that's used at the end of a string to say no more string after this point in memory.

还有0,用于存储器中字符串末尾,表示在此之后就,没有字符了。

哈佛公开课 - 计算机科学课程节选

It's really hard to say no.

要跟他说不行挺难的。

Is it okay 实战 - SpeakingMax英语口语达人

For example, Hispanics tend to be very agreeable and warm--and reluctant to say no to requests.

FORBES: Leadership

Is it fair to say no administration person is going to confirm these on the record?

WHITEHOUSE: Press Briefing

The diabetes cure gives me the strength to say no thank you to food.

BBC: 'My type 2 diabetes was cured after gastric bypass op'