1 tell-tale

2 informer (esp. to police)

3 whistleblower

4 grass

1 secret code

2 ciphertext

3 password

4 PIN

1 prop

2 support (for weight)

3 rest (e.g. arm rest)

4 thanks to

5 to hold in one's hand

6 to support in one's palm

7 to give

8 to base

9 to commit

10 to set

11 torr (unit of pressure)

1 to request sb to do sth

2 please!

1 motorbike

2 motorcycle (loanword)

3 classifier: 辆 liàng

4 classifier: 部 bù

1 inextricably linked (idiom)

2 inseparable

1 lit. to rein in the horse at the edge of the precipice (idiom)

2 fig. to act in the nick of time

1 to be unable to find a place to stay (idiom)

1 extortion and blackmail (idiom)

1 lit. to shade in the clouds to offset the moon (idiom); fig. a foil

2 a contrasting character to a main hero