Grow:
◆ We can use grow to talk about a lot of things (plants, animals, hair, people, cities, queues, sales, or the population of a country, etc.) (getting bigger, taller or longer or increasing in size or number)
Grow可以用来讨论很多事情，如植物、动物、头发、人、城市、队伍、销售、或一个国家的人口等等，形容长大、长高、变长或体积或规模或数量增加。
e.g.
1.The plants grow./We’re growing plants. (bigger, taller)
植物长大了/我们种植植物。
2.Our hair grow./We’re growing our hair. (longer)
头发长长了/我们留头发。
3.The sales have grown 20% in the first quarter. (increase in number)
第一季度的销售额提高了20%。
★ Grow is both transitive and intransitive. It can be used with an object or without an object.
Grow可以作及物动词或不及物动词，可接宾语或单独使用。
Grow up:
◆ We only use grow up to talk about a child developing into an adult
grow up 只能用来形容小孩长大成人。
e.g.
1.Where did you grow up? I grew up in Beijing.
你在哪里长大的？我在北京长大的。
2.When I grow up, I want to be a teacher.
长大后，我想成为一名教师。
3.Grow up doing sth = spend your childhood doing sth
从小开始一直做某事
I grew up dancing.
我从小开始跳舞。
★ Grow up is always intransitive, there is no object following it.
Grow up是不及物动词，不接宾语。
再来比较几个例子：
1.The children grew. (They got bigger and taller.)
孩子们长高长壮了。
2.The children grew up. (They became adults.)
孩子们长大成人了。
3.The children grew ten centimeters. (They got taller.)
孩子们长高了10厘米。
