这些动物安静下来，吃它们的午餐。
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.
武装组织用它们的武力来欺压平民。
我相信它们的味道一定鲜美极了。
它们的价格在$3到$15之间变化。
雄性动物热情地守护它们的交配对象。
两只鳄鱼把它们的大嘴栖息在水面上。
小狗崽儿一出生就和它们的妈妈分开了。
我们说过要保存它们的。
必须把这些事件同它们的历史环境联系起来看。
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.
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.
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.
一些独居的蜜蜂将它们的巢筑在土壤中的洞穴里。
有些列车超载如此严重，以至于它们的悬架都被压垮了。
Some trains were so overloaded that their suspension collapsed.
后果是打断食物链，使许多动物和捕食它们的动物饿死。
The effect was to disrupt the food chain, starving many animals and those that preyed on them.
像氖和氩这样的惰性气体，在它们的外电子层有8个电子。
Inert gases like neon and argon have eight electrons in their outer shell.
这些想法并不新。它们的发展自开战以来一直在稳步地继续。
The ideas were not new. Their development had proceeded steadily since the war.
海豚偶尔会在戏耍时用它们的尾巴拍打海水或剧烈地翻腾海水。
Occasionally dolphins slap the water with their tails or churn it up in play.
她的能力一直就在那儿；她所需要的只是一个展示它们的机会。
Her capabilities were always there; all she needed was an opening to show them.
钻石没有多少内在价值，它们的价格几乎完全取决于其稀有程度。
Diamonds have little intrinsic value and their price depends almost entirely on their scarcity.
水闸里注满水时，小鸭子们回到它们的妈妈身旁等待另一艘船通过。
As the lock filled, the ducklings rejoined their mother to wait for another vessel to go through.
虽然这些蔬菜能够适应我们这里的温和气候，但它们的产量常常不高。
Although these vegetables adapt well to our temperate climate, they tend to crop poorly.
它们的喧闹声逐渐变为整齐划一的、带有威胁性的吼叫，还夹杂着刺耳的狂吠。
Their noise modulated to a concerted menacing growl punctuated by sharp yaps.
斑马能动它们的耳朵。
因为它们的成本更低。
它们的成本下降了。
它们的颜色很好看。
它们的甲壳变薄了。
它们的味道像桔子。
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