If you know the person well, you can be informal and friendly use their first names, e.g. Paul, Ping.

如果你非常熟悉某人，你可以友好地、非正式地称呼他的名字，如Paul（保罗），Ping（平）。

youdao

A concise, perfect and friendly use interface is provided for inquiry and databank maintenance in this system, and it has a function to create report forms automatically.

该系统提供了简洁、完善、友好的使用界面，便于查询和数据库维护，并有自动生成报表的功能。

youdao

Use polite language and a friendly tone of voice.

使用礼貌的语言和友好的语气。

youdao

For example,the White House praised the city's use of environmentally friendly technology in its economic development.

VOA: special.2009.07.13

The toilet is a single-use bag made of environmentally friendly plastics.

VOA: special.2010.03.15

another ecology-friendly flooring that use fast-growing bamboo.

VOA: standard.2010.02.24

Among consumers, both companies are known for their innovations that made computers friendly to use.

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One big debate among the Japanese companies is what kind of eco-friendly technology to use.

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Some communities are ecologically friendly: they use solar power and green methods of waste removal, undertaking the daunting challenge of hauling non-biodegradable items off the mountain via pack animals as opposed to burning or burying trash.

BBC: Everest's growing problem