1都
dōu - all / both - adverb (副)
2
和
hé - and - conjunction
3
欢迎
huānyíng - to welcome / to greet - verb (动)
4
教授
jiàoshòu - professor - noun (名)
5
介绍
jièshào - to introduce - verb (动)
7
留学生
liúxuéshēng - international student - noun (名)
8
没什么
méi shénme - it doesn’t matter / never mind - phrase
9
秘书
mìshū - secretary - noun (名)
10
你们
nǐmen - you (plural) - pronoun (代)
11
他们
tāmen - they / them - pronoun (代)
12
位
wèi - a measure word for people - measure word (量)
13
我们
wǒmen - we / us - pronoun (代)
14
先
xiān - first - adverb (副)
15
校长
xiàozhǎng - president (of a university) / principal - noun (名)
16
学生
xuéshēng - student - noun (名)
17
一下儿
yīxiàr - a quantifier used after a verb to indicate a short action or a try - (数量)