Even the earliest of tribes had a system of numeration that, if not advanced, was sufficient for the tasks that they had to perform.

即使是最早的部落也有一种计算系统，哪怕不先进，也足以完成他们必须执行的任务。

youdao

Only humans and chimps, she said, had a system of communication where they deliberately sent a message to another group member.

她说，只有人类和黑猩猩有一个交流系统，会有意向另一个群体成员发送信息。

youdao

But we didn't have to deal with all those issues until we had a system that worked, and so far, we didn't.

但是在拥有一个行之有效的体系之前，我们不必为这些事情烦心，况且目前我们确实没有。

youdao

He had a system. He would describe characters and plots, then have ghostwriters expand those ideas into a book.

VOA: special.2009.08.24

No one, until this time, had suggested that a system would be subjected to quantization except for light.

在他之前，还没有人提出过,除光系统外的量子化系统。

麻省理工公开课 - 固态化学导论课程节选

In the 80s and the 90s, you had a very... economic system was very... you had a lot of tiers.

在八九十年代，你有一个很……经济体制很……分很多层次。

纽约的负面变化 - SpeakingMax英语口语达人

We have had a system that was not set up to serve kids, and we are changing that.

FORBES: Michelle Rhee

"I am a child of former slaves who had a system imposed on them, " Hill said before U.S. Magistrate Madeline Cox Arleo.

NPR: Lauryn Hill Gets 3 Months For Failing To Pay Taxes

Number one is that we got a -- we had a system in which there was huge amounts of leverage that banks could take.

WHITEHOUSE: The Economy and the American Family