三人行，必有我师(焉)

成语
非此即彼 an either-or situation, this or else that
此消彼长 a zero-sum situation, one person gains while the other loses
事已至此 when it comes to this, things having come this far
( ”pinyin” )

词汇
华人, ethnic Chinese; 中华民族, Chinese nation/ethnicity ( ”pinyin” )
https://mandarinbean.com/new-hsk-3-word-list/

Guardian:
要么我给你公布，要么你自己公布，三天之内非此即彼, either I announce it for you or you announce it yourself, it's one or the other within three days
凡事都是阴阳互补，此消彼长，这是天地之常理, everything is in balance, a zero-sum, this is the law of earth and heaven
事已至此，我就告诉你们吧, since things have come to this pass I'll tell you
[no 华 of this kind for obvious reasons]

Me:
你怎么这么固执，这又不是此消彼长的话。
在纽约有很多华人。

语法
彼此, "each other, one another"
https://resources.allsetlearning.com/chinese/grammar/Expressing_%22each_other%22_with_%22bici%22

词汇
克, gram; 千克, kilogram ( pinyin )
https://mandarinbean.com/new-hsk-2-word-list/
I wonder when you use 千克 and when you use 公斤?

Guardian:
我直说了，就是因为我们的自私窝囊对彼此的态度，才让恶势力有机可乘, I'll lay it on the line, it's because our selfish and cowardly attitudes toward one another just give the enemy more opportunities
[no 克 of this kind]

Me:
他们老是彼此吵架，当然不能成功。
你的猫它有多少克？