The base colors of my clothing are black and gray, so I knew black shoes would match everything.

我的衣服的基本色是黑和灰，所以我知道黑色的鞋子可以和所有衣服搭配。

youdao

All my tops can go with either a brown or black base.

我所有的帽子都可以任意和棕色或者黑色这类基色搭配。

youdao

Although this enabled many blacks to get free service at hospitals previously unavailable to them, it also cut into the membership base for black fraternal hospitals.

尽管这让许多黑人在医院得到以往未获得的免费服务，但却削弱了黑人共济医院的会员制基础。

youdao

Members of the Congressional Black Caucus were in Columbus over the weekend focusing on turning out their base of black voters in the all-important state of Ohio.

CNN: Ground war: Getting out the vote

It would also be a smart move for the Republican Party if they ever hope to get on base with black voters.

CNN: NAACP chief: A GOP path to black votes

This time, too, the trial will be in Baton Rouge, farther from Mr Edwards' traditional black base.

ECONOMIST: Louisiana politics