I couldn't concentrate, presumably because I was so tired.
我的精神集中不起来，大概是太累了吧。
It began suddenly to slow down, presumably in obedience to a signal.
它突然开始减速，大概是为了遵从一个信号。
Logically we should learn about things before doing them and that is presumably why the experts enforce this in our educational system.
从逻辑上讲，我们应该在做事之前先了解清楚，这大概就是专家们在我们的教育体系中强制推行这一做法的原因。
Having made their wealth and reputations elsewhere, they presumably have enough independence to disagree with the chief executive's proposals.
他们在别处获得了财富和声誉，想必有足够的独立性来反对首席执行官的提议。
No reply from him yet; presumably he hasn't received my letter.
他没有回信，想必没有收到我的信。
Forehead rubbing by male deer on buck rubs presumably sends a great deal of information to other members of the same species.
雄鹿摩擦前额很可能向同类中的其它成员发出了大量信息。
When the egg is fertilized, the substances become active and, presumably, govern the behavior of the genes they interact with.
当卵子受精时，这些物质变得活跃起来，并可能控制与它们相互作用的基因的行为。
The ancient Maya were presumably more experienced and did better, but nevertheless they too must have faced risks of crop failures from droughts and hurricanes.
古代玛雅人也许经验更丰富，做得更好，但他们也一定会面临干旱和飓风引起谷物歉收的风险。
Debris thrown into the atmosphere by an asteroid collision would presumably contain large amounts of iridium, and atmospheric currents would carry this material all over the globe.
小行星碰撞后的碎片可能会含有大量的铱，而大气洋流会把这些物质带到全球各地。
The ancestors of plants were photosynthetic single-celled organisms that gave rise to plants presumably lacked true roots, stems, leaves, and complex reproductive structures such as flowers.
植物的祖先是进行光合作用的单细胞生物，由此产生的植物可能缺乏真正的根、茎、叶和复杂的生殖结构，如花朵。
The spear is presumably the murder weapon.
这矛很可能就是凶器。
These textbooks are, on the whole, small, presumably inexpensive to produce, but well set out and logically developed.
总体来说，这些教科书很小，成本应该也不高，但是内容陈述恰当，具有逻辑性。
When the American cheetahs disappeared, their influence on the evolution of pronghorn and presumably on other prey animals stopped.
当美洲猎豹消失后，它们对叉角羚进化的影响就停止了，对其他猎物的影响应该也停止了。
That presumably was not his original intention.
揆其本意，或非如此。
So presumably this, too, is a pun.
因此据我揣测这也是一个双关语。
可能这只是一个假象。
The wheel was presumably a rural invention.
推测起来，车轮便是农村的发明。
That, presumably, is thanks to the impending election.
这个大概归功于即将到来的选举。
The police are, presumably, aware of Sukey's existence.
据推测警察已经知道Sukey的存在。
Growth would presumably reduce the incentive to fight.
增长或许能降低战斗的动机。
This presumably increased pressure on local food supplies.
这大概增加了本地粮食供应的压力。
The latter is harder to prove and presumably less frequent.
后者更难证明，并且想必发生频率不那么高。
I mean you presumably still have friends and family back in Pakistan.
我的意思是你大概还有朋友和家人在巴基斯坦吧。
Austria is presumably internationally best known for its musicians.
奥地利估计是以其享誉国际的音乐家而闻名于世的。
Occasionally we see a fish leap, presumably from danger underneath.
有时我们能看到鱼儿跃出水面，也许它们是逃避水下的险情。
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