然而，有时物种入侵并非偶然。
有时他会装作偶然地移开头，那读者便会抓紧时间在他的头移回来之前读上一到两个词。
Every now and then he withdraws his head as if by chance. The reader will anxiously devour one or two words before Luke moves back into position.
这种简单的反应有时创造出令人费解的斑纹，而这可能只是出于偶然。
That simple reactions of this sort sometimes result in cryptic patterns could be a coincidence.
《经济学人》有时会偶然遇到一些不太能制成表的事实，但趣味性足以与同道中人——数据观察者们分享了。
SOMETIMES we come across facts that don't quite make a chart, but are sufficiently interesting to share with fellow data spotters.
有时，做出这些决策可以深思熟虑，但另一些情况做出的决策将变得很偶然。
Sometimes, this decision is made deliberately, but other times, it’s a matter of happenstance.
在我八九岁时，这是我最爱看的一个节目。甚至，现在我都15岁了，有时真正无事可做，感到无聊，打开电视，如果偶然碰上这个节目，还会很有兴趣地看上一会儿。
Even now at the age of 15, I will sit and watch it (only if I'm really bored) and learn something from it.
有时候它们会偶然地在池底游动，然而在其他时间里它们被训练者指导，并且在它们快速游动时会得到奖赏。
Sometimes they swam around their tanks casually, whereas at other times they were directed and rewarded by their trainers to swim at their fastest.
当我第一次开始交易时，我觉得我的交易方法有偶然性，也就是说有时能赚点，更多的则是痛苦。
When I first started trading I would describe my trading methodology as haphazard, meaning some success in between a lot of pain.
我经历过一段独居时期，也经历过跟人同居的时期，主要是看见一个人然后偶然与之约会，有时候是两个人“合伙”过一段时间。
I've gone through periods of living on my own, living with one of my partners, mainly seeing one person and casually dating on the side, or sometimes "partnering" with two people for a period of time.
偶然的剽窃有时是由文化差异导致的。
Accidental plagiarism can sometimes result from cultural differences.
偶然误差，有时出现在这个方向，有时又出现在另一个方向，并且因其特有的性质而不可预测。
Accidental errors act sometimes in one and sometimes in another direction and by their very nature can't be predicted.
有时候是为了方便。有时候是偶然的放纵，他们不是每天都消耗。
Sometimes, it's for convenience. Sometimes, it's an occasional indulgence, and it's not something they would consume every day.
这是让人不安的有时当你看你的朋友，还记得你第一次会议是偶然。
It is unnerving sometimes when you look at your friend and remember how accidental your first meeting was.
偶然性的学术剽窃有时候可能是文化差异导致的。
Accidental plagiarism can sometimes result from cultural differences.
请教红字部分是“这种花生长在兰花园很是偶然”还是“兰花园有时举办兰花展览”？谢谢！
The orchid vanda miss joaquim is singapore's national flower and occasionally this flower is displayed at the orchid garden.
拥挤的教室里免不了手肘、脚尖轻轻地碰触，有时是偶然的，有时是故意的。
Their elbows and toes touched and bumped inevitably in the crowded classroom, sometimes accidentally, sometimes intentionally.
不常进入森林的人常把森林中的小玩意儿一路上拿在手里玩，有时故意，有时偶然，把它们留下了。
They who come rarely to the woods take some little piece of the forest into their hands to play with by the way, which they leave, either intentionally or accidentally.
最后得到好东西，不是幸运，有时候，必须有前面的苦心经营，才有后面的偶然相遇。
It's not luckiness to get the best finally. Sometimes, you should be at pains to have the haphazard meeting.
最后得到好东西，不是幸运，有时候，必须有前面的苦心经营，才有后面的偶然相遇。
Finally get good thing, not lucky, sometimes, there must be in front of the painstaking management, just have the behind of the meet by chance.
有时重要的交流是很偶然的。
Sometimes the most important communications are those that are serendipitous.
他们有时候被称为故意的或偶然添加剂。
They are sometimes called unintentional or incidental additives.
这是偶然吗，应该不是。你的Texas口音有时候的确流露出几分。
Was that accidental, probably not. your accent does come out, I don't know.
有时，那些向人们演示如何将指尖放在扫描器上的工作人员，会偶然地扫描自己的指尖。
Sometimes the workers who show people how to place their fingers on the scanner accidentally scan their own fingerprints.
这是我的主意，它们有时会偶然冒出来。
最后得到好东西，不是幸运，有时候，必须有前面的苦心经营，才有后面的偶然相遇。
Finally, be a good thing, not lucky, and sometimes, there must be in front of painstaking efforts, have a chance encounter later.
最后得到好东西，不是幸运，有时候，必须有前面的苦心经营，才有后面的偶然相遇。
Finally, be a good thing, not lucky, and sometimes, there must be in front of painstaking efforts, have a chance encounter later.
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