1 letter

2 mail

3 classifier: 封 fēng

4 to trust

5 to believe

6 to profess faith in

7 truthful

8 confidence

9 trust

10 at will

11 at random

1 information

2 news

3 message

1 to rank

2 ranking

3 seniority (among siblings)

1 to travel

2 journey

3 trip

4 classifier: 趟 tàng

5 classifier: 次 cì

6 classifier: 个 gè

1 to be convinced (that sth is true)

2 to believe

3 to accept sth as true

1 obstinately clinging to one's course (idiom)

2 willful

3 one's own way

4 dogmatic

1 ten lines at a glance (idiom)

2 to read very rapidly

1 lit. doesn't (even) enter a single aperture (of one's head)

2 I don't understand a word (idiom)

3 it's all Greek to me

1 every word and action (idiom)

1 grasp this fundamental point and all the rest will follow (idiom)