Meaning of wèi:
位
position; location; place; seat; (physics) potential
Tā shì gōngsī de zhòngyào zhíwèi.
他是公司的重要职位。
He holds an important position in the company.
Zhè shì yī wèi zhòngyào de kèrén.
这是一位重要的客人。
This is an important guest.
Zhè wèi yǎnyuán de biǎoyǎn fēicháng jīngcǎi.
这位演员的表演非常精彩。
This actor's performance was very exciting.
Qǐngwèn zhège zuò wèi yǒu rén zuò ma?
请问这个座位有人坐吗?
Excuse me, is this seat taken?
Zhè gè zhuāngzhì kěyǐ cèlíang diàn wèi.
这个装置可以测量电位。
This device can measure electric potential.
classifier for people (honorific); classifier for binary bits (e.g. 十六位 16-bit or 2 bytes)
Zhè wèi lǎoshī hěn yǒu nàixīn.
这位老师很有耐心。
This teacher is very patient.
Zhè zhǒng diànnǎo shǐyòng de shì liùshísì wèi chǔlǐqì.
这种电脑使用的是64位处理器。
This type of computer uses a 64-bit processor.