Some more common phrases...
far fetched- something that seems

unachievable of unlikely to occur
Example:
The idea of you becoming an astronaut seems far fetched to me.
Living on the moon is too far fetched.
Having 20 kids sounds far fetched.

Too good to be true- something that sounds too good to be true
Example:
Winning the lottery sounds too good to be true.
True love sounds too good to be true, it probably only ever exists in fairytales.
The teacher told me that I can pass the test if I gave her a dollar, which I thought sounded too good to be true.

Glued to the screen- when you watch too much tv, play on your phone too much
Example:
You’ve been on your phone for 3 hours straight now, are your eyes glued to the screen?
I’ve been doing homework all day, my eyes are glued to the screen.

Blood, sweat, and tears-when you worked extremely hard for something and sacrificed something important
Example:
I poured my blood, sweat, and tears on this project, I hope I pass with an A+.
She poured her blood, sweat, and tears into her business and is now a millionaire.
(Sorry for lack of chinese translation)