「不正当」怎样地道地表达？

shady 

1. 阴凉的、阴暗的

2. 不老实、不正当、非法、鬼鬼祟祟

She's been involved in some shady deals.

她参与了一些不正当的交易。

Mr.Wong is a shady character. Mr.Wong 是个一个鬼鬼祟祟的人。

The intro

(Listening Comprehension)

Hello and welcome to "Mr.Wong's Tech Talk". Today we're gonna be looking at the iphone 10. It is the first iphone without a home button. Now if you ask me , that's next generation technology right there. On the iphone 10 you don't have to use touch ID to unlock your phone , all you need to do is look at it and it'll recognize you. They say it is one of the most advanced technology they have ever created. It features a flood illuminator, ambient light sensor, dot projector,  proximity sensor I don't know what the heck that is but it sounds legit so yeah ! Speaker, microphone, front camera, infra-red camera. Everytime you glance at your iphone it detects your face even in the dark ! You can also use face ID to make purchases with Apple Pay and third party apps. I mean the new iphone is great and all but do not purchase your iphone from any shady websites or stores. You might end up getting a broken one or a stolen one. Now before we continue, I just wanna say...Apple did not pay me to talk about their products. I just had nothing to say leading up to today's word of the day. And I'm not even an apple user. It's too damn expensive ! Anyways, today's word of the day is "shady". Check it out !

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（这才是真正的学习过程）