Even within the tropics, language diversity varies widely.

即使在热带以内，语言的多样性也是差异很大。

I could easily distinguish objects 100 meters away.

我可以清楚地分辨一百米以内的物体。

Well, we actually can, with five centimeters of precision.

实际我们可以，在5厘米的误差范围以内。

It's illegal to get within 1,500 feet of the animals without a federal research permit, so whale watchers are discouraged from attempting to get close to the whales.

在没有联邦研究许可的情况下，在 1500 英尺范围以内接近这些动物是违法的，因此，鲸鱼观察者被劝阻不要试图接近鲸鱼。

That means outdoor gatherings will be limited to 10 people, restaurants curbside or delivery only.

这同时意味着户将限制在10人以内，餐厅只能在路边摆摊或送货门。

Being within six feet of an infected person for a cumulative total of 15 minutes or more over a 24 hour period.

在24小时内，与感染者6英尺以内，处总共15分钟或更长时间。

Authorities also say they hope to cap Beijing's population at 23 million people by 2020.

有关部门表示，他们希望到2020年，能将北京市常住人口控制在2300万人以内。

One study from 1992 had female marathon runners drawing level with men by 1998, to complete the 42.195km course in just under two hours and two minutes.

据1992年的一项研究，到了1998年女马拉松运动员将与男马拉松运动员统一标准，即在2小时2分以内跑完42.195公里。

Of course the eerie image was captured by the Hubble Space Telescope in June and get a good look while you can because scientists say this will only be visible for 100 billion more years.

当然这张令怪异的图像是哈勃太空望远镜在6月份拍摄的，科学家说因为望远镜能看到1000多亿年离以内的东西，这张图片看起来才拍得这么好。

People are being told to limit their showers to 90 seconds.

当地要求人们把洗澡的时间控制在90秒以内。

It made you more in control of yourself, because you had to be or else you'd get completely loss in the ... I think I limit my social media to a lot of healthy stuff, actually.

这迫使你要更多地控制自己，因为你必须这样做，否则就完全迷失在其中。实际，我觉得我是在健康安全的界限以内来使用社交媒体的。

So if you're totally blind – or able to see but living in a dark cave – you have a ticking clock but with no connection to the outside world.

全所以生物钟没有什么问题，生物钟依旧以内在的周期运作，就和把你放在黑暗的山洞里一样。

In the last year, we've reached unprecedented clarity about the fact that there is no room for new fossil fuel infrastructure if we are to have a decent shot of limiting the warming of our climate to 1. 5 degrees.

去年，我们从未如此清晰地意识到了眼下我们绝不可能去建设化石燃料的新基建，如果我们还想孤注一掷将我们的气候变暖控制在 1.5 度以内。

Tracers try to contact every person who came within two meters of an infected person.

追踪者试图与每一个曾与感染者两米以内的人取得联系。

For a general rule of thumb, keep your comments to two minutes or less.

一般来说，把你的评论控制在两分钟以内。

And generally they can't go more than 150 feet from a single router.

一般来说，路由器方圆150英尺以内才能接收到信号。

Diplomacy has gone online and while Tuesday's speakers alone included the leaders of the United States, China, Russia, France, Iran and all of them within hours.

交活动已经在线展开了，周二发言的领导人分别来自美国、中国、俄罗斯、法国、伊朗等国，他们的发言时间控制在几个小时以内。

I try to keep it under three minutes, so that's one reason.

我尽量将每期节目的时长控制在3分钟以内，这是其中一个原因。

We try to control this information feedback loop within three months.

我们努力把这种信息反馈循环控制在三个月以内。

Evidence for trade over thousands of kilometers has been found from this period.

在这个时期，贸易证据在数千公里以内都可以被找到。