1 to open

2 to show (a ticket)

3 to turn on

4 to switch on

1 to speak

2 to explain

3 to negotiate

4 to emphasise

5 to be particular about

6 as far as sth is concerned

7 speech

8 lecture

1 to open

2 to start

3 to turn on

4 to boil

5 to write out (a prescription, check, invoice etc)

6 to operate (a vehicle)

7 carat (gold)

8 abbr. for Kelvin, 開爾文|开尔文[Kāi ěr wén]

9 abbr. for 開本|开本[kāi běn], book format

1 to begin

2 beginning

3 to start

4 initial

5 classifier: 个 gè

1 to feel happy

2 to rejoice

3 to have a great time

4 to make fun of sb

1 one man can hold the pass against ten thousand enemies (idiom)

1 One key opens one lock.

2 There is a different solution for each problem. (idiom)

1 to speak without thinking (idiom)

2 to blurt sth out

1 to start sth new or original (idiom); to break a new path

2 to break fresh ground

1 lit. mention the pot that doesn't boil (idiom); to touch a sore spot

2 to talk about sb's weak point