Wagon trains — groups of wagons — rode in four lines across the land when they passed through dangerous country. If attacked, the wagons could quickly form a circle for defense.

马车队(即一群马车)，当他们经过危险区时，他们排成四排向前行进，如果遭受到攻击时，这些马车就会很快地形成一个保护圈进行抵抗。

youdao

You have to learn to listen to a circle, put dangerous card to take the son, don't listen to the same addresses and be big man.

你要学会绕个圈子成听牌，把危险牌搭成搭子，不要和做大牌的人听同一门牌。

youdao

Thers is also the tiger drilling circle, but I think it's dangerous.

还有老虎钻圈，不过我觉得这很危险。

youdao

While it used to be dangerous to walk a few blocks to a nightclub in Logan Circle, that neighborhood is now known for its sprawling Whole Foods grocery store.

WSJ: Washington, D.C.: The New Boomtown