Chinese phrase
这主要是由〜造成的 zhè zhǔ yào shì yóu 〜 zào chéng de
Meaning
This is mainly caused by ___
When to use it
It says that something is mainly caused by a certain factor. It is used to give a main cause in a clear, factual explanation.
Example dialogue
最近南方多地出现严重内涝，主要原因是什么？ zuì jìn nán fāng duō dì chū xiàn yán zhòng nèi lào zhǔ yào yuán yīn shì shén me
Recently, severe urban flooding has occurred in many southern areas. What is the main cause?
这主要是由短时强降雨造成的。 zhè zhǔ yào shì yóu duǎn shí qiáng jiàng yǔ zào chéng de
This is mainly caused by heavy rain over a short period.