如果头痛只发生在晚上，缺少新鲜空气和氧气常常是其原因。
If headaches only occur at night, lack of fresh air and oxygen is often the cause.
性别对他们来说更为重要，因为亲吻脸颊通常只发生在女性之间，或者一男一女之间，而不是两个男性之间。
Gender matters more for them because check-kissing often only happens between women or a man and a woman but not two men.
这通常只发生在,它们互相平行的时候。
And, the way in which that happens is if they are actually parallel to each other.
自动救助只发生在奥巴马身上(13分)。
请求与端点的绑定只发生在请求解析的时候。
The binding between a request and an endpoint occurs only at the moment the request is resolved.
对于这种情况，导航只发生在客户端。
At that point, navigation happens purely on the client side.
苹果树的光合作用几乎只发生在叶内。
In apple trees photosynthesis occurs almost exclusively in the leaves.
这种情况只发生在他们进地狱的头一百年。
This, however, happens only during the first hundred years of their damnation.
过去五十年的主权违约只发生在新兴国家。
Over the past 50 years sovereign defaults have been confined to the emerging world.
它只发生在一瞬间，有时候却是一生永远的回忆。
It takes but a moment, but the memory of it sometimes lasts forever.
请使用注释者方面方法，参与只发生在对注释类型的共同理解这一级别。
With the annotator aspect approach, the participation occurs only at the level of a Shared understanding of annotation type.
不过，是不是这种事情只发生在那么无法继续支付抵押贷款的失败者身上？
Still, things like this only happen to losers who can’t keep up their mortgage payments, right?
耗尽地址空间通常只发生在32位进程中—因为可以轻松地分配最大4gb地址空间。
Exhausting the address space typically only happens with 32-bit processes - because the maximum 4gb of address space is easy to allocate.
光合作用只发生在包含叶绿素的植物细胞，藻类，某些原生动物和细菌内。
Photosynthsis occurs only in the chlorophyll-containing cells of green plants, algae, and certain protists and bacteria.
约好一起看电视，这种事情大概只发生在看体育比赛或者现场真人秀的时候。
Appointment-to-view television, if it exists at all, seems confined to sport and live reality shows.
由于这些类型的问题通常只发生在应用程序负载很重的情况下，所以往往非常难以测试。
These sorts of issues are very hard to test for because they generally only occur when an application is under heavy load.
遮遮掩掩的申请只发生在那些没有好的公立学校的地区发生(伦敦尤其糟糕)。
Dodgy applications happen only in places with a shortage of good state schools (London is particularly bad).
由于更重要的发酵只发生在有氧条件下的氧气或空气好电源(无菌)是必要的。
Since the more important fermentations occur exclusively under aerobic conditions a good supply of oxygen or air (sterile) is needed.
那并不表示它不会发生，因为它没有理由会只发生在那，而不会发生在其他地方。
That's not to say it's not occurring because there's no reason why it should only occur there and not anywhere else.
家暴并不是只发生在一个地方，如果知道它们发生在哪里你会非常惊讶，到处都有发生。
Domestic violence is not just in one place, it would surprise you where it happens - it's right across the spectrum.
在有人需要法律辩护的情况下，假设只发生在他们没有钱时，我们才不得不在那方面资助他们。
In a situation where someone would need legal defense, supposedly it would only happen that we would have to support them in that respect if they didn't have the money.
问为什么这种情况只发生在某些人身上而没有发生在其他人身上有点像进入了压抑心理学的兔子洞里。
Asking "why" this happens to some and not for others is a bit like going down a rabbit hole of repressed psychology.
这一跳变只发生在铁磁金属态，表明这是一个磁性相关联的效应，可能对应一种新的磁性开关过程。
This switching phenomenon occurs only in the ferromagnetic metal state and strongly suggesting a magnetic related effect.
声音只发生在寂静赤道的两边，因为运动存在于赤道的两边，而在未分离的赤道上完全不存在运动。
Sound takes place only upon each side of its equator of silence, for there is motion on each side and no motion at all on the dividing equator.
声音只发生在寂静赤道的两边，因为运动存在于赤道的两边，而在未分离的赤道上完全不存在运动。
Sound takes place only upon each side of its equator of silence, for there is motion on each side and no motion at all on the dividing equator.
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