1 straight (in a straight line)

2 continuously

3 always

4 from the beginning of ... up to ...

5 all along

1 to be connected

2 traffic

3 transportation

4 communications

5 liaison

1 common

2 ordinary

3 general

4 average

1 surname Huo

1 train

2 classifier: 列 liè

3 classifier: 节 jié

4 classifier: 班 bān

5 classifier: 趟 tàng

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

1 don't act until the time is ripe (idiom)

1 to act in collusion (idiom)

1 mutual exchange of assistance (idiom)

2 to benefit from each other's strengths and make up each other's shortfalls

3 to reciprocate with material assistance

4 scratch each other's back