如果所谈论的事情完全发生在过去，则用过去时态(有时也叫做未完成时态)，例如：I used to live in Seattle /我过去住在西雅图。
If you are talking about something that is completely in the past, you use the Past Tense (sometimes called the Imperfect), e.g.
它也可能发生在完全不相关的、争夺相同资源的组织中，比如以种子为食的啮齿动物和蚂蚁。
It may also occur among totally unrelated forms that compete for the same resource, such as seed-eating rodents and ants.
像头痛、背痛和其他疼痛、头晕、肌肉抽搐、痉挛性震颤等，都是完全健康者也可能发生的。
Headaches, backache and other pains, light-headedness, jerks and tremors all occur in totally healthy persons.
就算日志在结尾说构建已成功，您仍然需要查看它以完全理解发生了什么。
Even if the log says BUILD SUCCESSFUL at the end, it's still worth taking a look at it to fully understand what has happened.
但是除部署团队以外的其他每个人完全不清楚即将发生的更改。
But everyone else beyond the deployment team is completely unaware of the changes that are about to occur.
目标站点上的数据库现在已经完全可访问并且包含所有在主站点上发生的更新。
The database at the target site is now fully accessible and contains all committed updates that occurred on the primary site.
这意味着你能“完全”预编译Ruby脚本，根本无需发生运行时代码生成。
This means Ruby scripts can be "completely" precompiled, so that no runtime code generation needs to happen at all.
如果这时发生了抢占，由于重新调度，FPU状态就会与抢占前完全不同。
If preemption happens here, then upon reschedule, the FPU state is completely different from what was there before preemption.
因此，莫斯科总部决定装作什么都没有发生，尽力强化Philby的想法——莫斯科完全信任他和他的小团体。
All right, then, Moscow reasoned, let's pretend that nothing has happened and do our best to reinforce Philby's conviction that we trust him and his ring completely.
就拿上周发生撞车事件的郊区线路来说，驾驶员们就在抱怨，说安全系统并没有完全处于正常运转状态。
As with the suburban line on which last week's crash occurred, drivers complain that safety systems are not fully operational.
日全食发生在太阳被月亮完全遮住的情况下。
A total solar eclipse occurs when the sun is completely obscured by the moon.
邓不利多：地下室里你和奎洛教授之间所发生的事情完全是个秘密，所以，很自然地，整个学校都知道了。
Dumbledore: What happened down in the dungeons between you and Professor Quirrell is a complete secret, so, naturally, the whole school knows.
还有的时候，一些压力很大或者要求很苛刻的事情同时发生，我真的一下子完全抓狂了。
Other times, several stressful or attention-demanding events will happen at once, and I suddenly go from calm to completely overwhelmed really quickly.
值得注意的是，在催眠的研究领域，这一结果意味着催眠不再被视为是在意识完全清醒的状态下发生的心理意向。
Significantly, in the field of hypnosis research this result means that hypnosis can no longer be regarded as mental imagery that takes place during a totally normal waking state of consciousness.
这种病发生在眼部排水渠道完全堵塞时，而且症状明显——视力模糊、头痛、眼痛并作呕。
This happens when the drainage canals become completely blocked, and symptoms can be vivid - blurred vision, headaches, eye pain and nausea.
可喜的是，美国完全有能力避免类似事情的发生。
The good news is that it is entirely within the capacity of the United States to avoid this.
现在，一个物理学家团队认为这样的情况是不会发生的，因为实际上，黑洞在完全形成之前就会消失殆尽。
A team of physicists now proposes that such a scenario may never occur because the black hole actually disappears before it forms.
这种变化与地球磁场曾经发生过的变化相比还算温和的——有时地球磁场会完全翻转，地磁北极和地磁南极会对调。
These changes are mild compared to what Earth's magnetic field has done in the past - sometimes the field completely flips, with the north and the south poles swapping places.
这种变化与地球磁场曾经发生过的变化相比还算温和的——有时地球磁场会完全翻转，地磁北极和地磁南极会对调。
These changes are mild compared to what Earth's magnetic field has done in the past —sometimes the field completely flips, with the north and the south poles swapping places.
出于一些还没有被完全理解的原因，许多水生生物只在被打扰的时候才会发生生物荧光现象。
For reasons that are not entirely understood, many marine organisms bioluminesce only when disturbed.
还有一点鲜有提及：“投机性货币流”通常发生在货币完全或部分挂钩的国家之间。
Also rarely explained is that "speculative money flows" usually occur between countries that have pegged or partially pegged currencies.
确定性：理论假定决策制定者对每个选项后会随之发生的结果拥有完全且准确的知识。
Certainty: theories that assume the decision-maker has complete and precise knowledge of the consequences that will follow on each alternative.
这是一个古怪的小世界，看起来完全与世隔绝，但是却在观看故事发生在里约热内卢的巴西肥皂剧。
Theirs is a bizarre little world: it seems totally isolated, but then they're watching Brazilian soap operas set in Rio.
在这个情景下，之前仅仅在猴子能够得到的范围内发生的行为才激活的镜像神经元，完全停止了反应。
In this situation, the mirror neurons that responded before only to the observation of an action within the monkey's reach completely stopped firing.
SDO模式自省在PHP实现中没有完全启用，但我们预期这一现象会随时间而发生变化。
SDO model introspection is not fully enabled in the PHP implementation, but we expect this to change over time.
尽管使用完全指定sslpeer值的两个ca之间意外发生此类DN冲突的情况不太可能出现，但向SSLPEER规范添加通配符仍会提高其几率。
Although it is unlikely that such a DN collision between two CAs could occur by accident with a fully-specified SSLPEER value, adding wildcards to the SSLPEER specification increases that chance.
委员会是根据全球形势以及从正在发生流感的数个国家获得的情况报告作出这一评估的，我本人完全同意委员会提出的建议。
The Committee based its assessment on the global situation, as well as reports from several countries that are now experiencing influenza. I fully agree with the Committee's advice.
委员会是根据全球形势以及从正在发生流感的数个国家获得的情况报告作出这一评估的，我本人完全同意委员会提出的建议。
The Committee based its assessment on the global situation, as well as reports from several countries that are now experiencing influenza. I fully agree with the Committee's advice.
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