它们是用拉绳系紧的。
我们说过要保存它们的。
光子没有质量——它们是没有重量的。
它们的价格在$3到$15之间变化。
它们的年龄可从其生长速度来推定。
Their age can be determined by extrapolation from their growth rate.
雄性动物热情地守护它们的交配对象。
武装组织用它们的武力来欺压平民。
这些动物安静下来，吃它们的午餐。
“这双鞋太紧了。” — “不过，它们确实和你的裙子相配。”
"The shoes are too tight."—"Well, they do match your dress."
这些电影不仅赚钱，它们还被认为是有创意的。
These movies were not only making money; they were also perceived to be original.
我们拿相对无害的药品，把它们转化成毒药。
We're taking relatively benign medicines and we're turning them into poisons.
必须把这些事件同它们的历史环境联系起来看。
我们亲自进行了现场测试，对它们的运行很满意。
We've field-tested them ourselves and are happy that they work.
因为它们是手工制作的，每一件都略有不同。
它们被种在阳光充足、没有多少水分的山坡上。
They are grown on the hillsides in full sun, without much water.
它们都是在作者一栏下面按字母顺序来归档的。
我们相当依赖现成的熟食–它们如此方便。
We rely quite a bit on ready-made meals – they are so convenient.
它们看上去像是某种猛兽的牙齿。
它们作为美国音乐剧的杰作流芳百世。
多萝西，快点。别担心你的鞋。它们很快就会干的。
Dorothy, come on. Never mind your shoes. They'll soon dry off.
我的药片很容易区分，因为它们的颜色不一样。
It's easy to tell my pills apart because they're all different colours.
古董的价值依它们的保存状况和稀有程度而定。
The value of antiques will depend on their condition and rarity.
两国对它们沿海海域的边界是有争议的。
The two countries are in dispute over the boundaries of their coastal waters.
其他的穷国向外看，加强它们和经济大国的联系。
Other poor countries looked outward, strengthening their ties to the economic superpowers.
它们通常很胆小，极少远离自己的洞穴。
拉力的增加与到达它们最终点的距离成相反的比例。
The tension grew in inverse proportion to the distance from their final destination.
把所有的专有名词大写，它们之前的冠词(a,an)则不用。
Capitalize all proper nouns but not the articles (a, an) that precede them.
狮子逼近它们的猎物。
你的工作是把它们按字母编组，再把它们按数字顺序排序。
Your job is to group them by letter and put them in numerical order.
既然它们能够而且确实可以成功杂交繁殖，它们就不能被归为不同的物种。
Since they can and do successfully inter-breed, they cannot be classed as different species.
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