Mix in colds, which are prevalent this time of year, and the immune system of Americans could be dealt a one-two punch.

在一年之中的这个时候，由于混合了普通感冒，美国人的免疫系统将面临组合拳的打击。

youdao

But the system has also encouraged farmers to alter time-honored crop rotation practices and the mix of herbicides that previously had kept weeds in check.

但是该体系鼓励农民改变长期以来的轮作制度和混合使用除草剂，在以前这些方法很好的控制了杂草。

youdao

The original system, Mix, was built in COBOL to run on a mainframe.

原先的系统Mix是用COBOL构建的，运行于一个主机系统上。

youdao

Various polls have shown the American public overwhelmingly supports a debt plan that includes a mix of reforming the tax system, which would raise revenue, and large spending cuts.

CNN: Reid and McConnell: The Senate's odd couple

They also found changes in the mix of cells within the animals' immune system itself.

ECONOMIST: Social status and health

True, there have been some complaints from those who see the new operating system as an uneasy mix of the new mobile world and the old desktop environment, but Microsoft seems confident that all is going to plan.

BBC: Windows boss shown the door