咱们能在茫茫人海中相遇，并相知相伴，是有原因滴。至于是啥原因嘛，当然是“birds of a feather flock together”。啥意思呢？来看看下面的对话：
– Well, I’m really into nature. I do yoga outside, I love having picnics by the river… What about you, what do you do?
– I’m an IT guy. So basically I spend most of my days by the computer. Are you into it?
– Not really. But my friend Ben, he’s obsessed with computers. You should meet him, let me see if he’s around, actually. I’m sure you’d love him! Birds of a feather flock together.
– Oh yeah, I’d love to meet him then!
‘Birds of a feather flock together’，也可以表达为birds of a feather fly together。它的意思是有相似兴趣或品味的人很容易组成群体。常见的两种用法：
to form groups with people with similar interests and tastes
people of same flavour or interest gets together in groups
I knew Mary and Mark would get along well, seeing as they both enjoy science fiction so much. Birds of a feather flock together.
I knew you and John would get along well—birds of a feather fly together, after all.
拓展一：Saying you are a certain number in the family and how to ask
Which number are you in the family/of your siblings?
I'm the fifth/third/8th.
I'm the second oldest.
I'm the third from the youngest.
I'm the second youngest in my family.
senior person (above 70)；
Older (not elder) person (50-60)。
拓展二：difference between older & elder:
? The oldest: the oldest child in the family
? Firstborn– eldest of the family
? My sister Katy is the oldest in my family.
? The baby: the youngest child in the family, even if they aren’t a baby anymore
? I'm the baby of the family.
? The middle child: (if there three children) the child born after the eldest and before the youngest
? The youngest: the youngest child in the family
? Only child: single child, without brothers or sisters.