Only two populations of this species of rhino exist, their combined numbers amounting to less than 60 animals total.

目前这种犀牛仅有两个族群还存在，它们所有的数量加起来也不超过六十头。

You can combine these numbers in a way to make every number up to 127.

您可以通过某种方式组合这些数字， 使每个数字都达到 127。

Going back to the example of house numbers, or addresses of buildings and houses, if you combine numbers together usually we combine just two numbers together.

回到门牌号的例子， 或者建筑物和房屋的地址，如果你把数字组合在一起， 通常我们只把两个数字组合在一起。

Well it doesn't mean weep... but if we combine trick number three with trick number two and stick an S after  that E with a hat, we get wespe.

嗯， 这并不意味着哭泣......但是如果我们将第三个技巧与第二个技巧结合起来， 并在带帽子的 E 后面加上一个 S，我们就得到了 wespe。

" Calculations" are when you combine numbers: you add them, you subtract them, you multiply them, or you divide them to find out how much of something there is.

“计算” 是指将数字组合在一起：将它们相加， 将它们相减， 将它们相乘，或者将它们除以找出如何计算有很多东西。

Combine that with overcrowding on the mountain, a number of inexperienced climbers, and some expedition companies that may not be prioritizing safety， and you have the reasons why climbers say it's been particularly dangerous in 2019.

再加上山上人满为患，许多没有经验的登山者，还有一些探险公司，可能不把安全放在首位，你有理由说明为什么登山者说2019年特别危险。