moving or allowing movement in both directions

a two-way street 可双向通行的街道

Two-way radios can both send out and receive signals.

A two-way situation involves two people or two groups of people working together to achieve a shared aim.

Negotiations are a two-way thing - both sides have to come to a compromise. 谈判是双方的事——双方都必须作出妥协。

Remember, friendships are a two-way street (= both people have to make an effort). 记住，友谊是需要双方共同付出努力的。