为何

nǐ wèi hé rú cǐ gāo xìng

你为何如此高兴？

Why do you look so happy?

wèi hé bù zài shì yī xià

为何不再试一下？

Why not try again?

hěn nán shuō qīng chu zhè yī háng yè wèi hé xíng xiàng rú cǐ zāo gāo

很难说清楚这一行业为何形象如此糟糕。

It’s difficult to explain why the industry has such a bad image.