"Base 4," I said.

“4进制。”我说。

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It was on Nov 4, 1923, the British archaeologist Howard Carter stumbled on a stone at the base of the tomb of another pharaoh in Luxor that eventually led to a sealed doorway.

1923年11月4日，英国考古学家霍华德·卡特在卢克索另一位法老墓的底部偶然发现了一块石头，这块石头最终通向了一个封闭的门口。

youdao

Part of Chang'e 4's mission (使命) is to see how a moon base could be built for humans, including exploring (探索) whether humans could grow food and other plant products there.

嫦娥4号的部分使命就是探测怎样为人类建一个月球基地，包括探索人类是否能在上面种植食物和其他植物。

youdao

But now at least you have a template that you can base cookies number 2 and 3 and 4 and 5.

但是最起码你有一个饼干人模板,可以据此制造出2号饼干人，3号，4号，5号等等。

哈佛公开课 - 计算机科学课程节选

N 6 Sixteen, so that's 16 times log base 2 of 16 and though I'm writing small here, log base 2 of 16, 16 this gives me 4 'cause 2 to the 4 equals 16.

是多少呢？，Well，，N，is，what？,16，那就是16乘以以2为底16的对数6,在这儿我将2写小一些，以2为底16的对数是4，因为2^4等于。

哈佛公开课 - 计算机科学课程节选

It's part of a wider strategy to boost its overall subscriber base from 4.5m to 7m.

BBC: Business

After more than eight hours aloft, the aircraft landed safely back at Manching Air Base at 4:38 p.m.

ENGADGET: Northrop Grumman, Cassidian run Euro Hawk UAV through its first full test flight (video)

Tiscali said the Liberty Surf deal would increase its active subscriber base to 4.9 million from 3.8 million.

BBC: Italy's Tiscali buys Liberty Surf