There are also the opportunity costs: what cures for disease, what other useful discoveries might we never know of, because a habitat is destroyed forever, or land is polluted beyond all use?
还有所谓的机会成本：什么东西能够治愈疾病，还有其他有用的新发现，也许我们永远不会知道，因为栖息地被永远破坏，或土地被污染而没法使用。
But we also say thank you because we want the other person to know we value what they've done for us and, maybe, encourage them to help us again in the future.
但我们跟别人说谢谢是因为我们想其他人知道我们珍惜他们为我们所做的一切，或许，鼓励他们在未来继续帮助我们。
I know many people will say we were successful because we used this new type of IVF, but I also like to think we chose a propitious time.
我知道很多人认为我们之所以成功，是因为采用了最新的人工受孕技术，但我还是认为我们选择了一个正确的时间。
We can also expect that vendors will trip over each other trying to prove which one has the stronger security and privacy policies, because they know those factors are game-breakers.
我们也应预期供应商将会互相牵制，试图证明谁拥有更强壮的安全性和隐私策略，因为他们知道这些因素是游戏规则的破坏者。
And you can reduce also the side effects, which is very important because we know that the death rate is mainly higher when people are not put early on treatment.
治疗中的副作用也可以减轻。这很重要，因为我们知道死亡率高主要是由于感染者没有得到初期治疗。
And we take that in consideration because we also know that's very cultural thing. We understand that.
我们也考虑到了这一点，这是不同文化造成的，我们也能理解。
We also know that op is a scalar variable because it is prefixed with the $.
我们还知道op是标量变量，因为它的前缀是 $。
And I know that sentiment was shared by people, not just across our country, but also around the world because of what we've achieved together in the past and what we can do together in the future.
我知道，不仅是我们国家的人民，全世界的人民都在分享这份喜悦——这是因为我们在过去所取得的成就，以及我们能够共同创造的未来。
Some people we know love is also going to give up, not because of the results.
有些人，我们明知道是爱的，也要去放弃，因为没结果。
His movement is good, his finishing is fantastic and I know he will score a lot of goals for us because we now have more possibilities in the wide areas and also between the lines.
他有很好的移动以及临门一脚。我知道他将会为我们进很多球，因为现在我们在两边和中路有了更多变化的可能。
Professor Marcelin: I think this is a good idea because we know the nucleoside and nucleotide analogs are sublimitation and also you got your own limitations.
Marcelin教授：我认为这是个好办法，因为我们知道核苷类药物是次限制的，而每个人会有自己的限制。
Because time is of the essence, it is also very important to know how soon we could get the samples.
时间非常急，我们必须尽快收到合理的价格和样品。
Because time is of the essence, it is also very important to know how soon we could get the samples.
时间非常急，我们必须尽快收到合理的价格和样品。
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