1 to demand

2 to request

3 to coerce

1 main

2 principal

3 major

4 primary

1 there is no need

2 why should

1 if only

2 so long as

1 certainly

2 must

3 will

4 necessarily

1 lit. if three walk together, one can be my teacher (idiom, from the Analects of Confucius)

2 you have sth to learn from everyone

1 don't insist on only taking one road to Rome (idiom)

2 there's more than one way to skin a cat

1 lit. when two tigers fight, one is sure to be wounded (idiom)

2 fig. if it comes to a fight, someone will get hurt

1 He who gives no thought to far-flung problems soon finds suffering nearby (idiom, from Analects).

2 Smug concentration on the here and now will lead to future sorrow.

1 things are very different now (idiom)

2 times have changed