var+value}: If exists, return .
${var+value}：如果存在，就返回 的值。
var=value}: If exists, return 's value.
${var=value}：如果存在，就返回 的值。
var:-value}: If exists and isn't NULL, return 's value.
${var:-value}：如果存在且不是NULL，就返回 的值。
Fang Wencong in her life has vanished, actually as if exists by one special way.
方文从她的生活中消失了，却似乎又以一种特殊的方式存在着。
Need to check if an active market exists for the asset and liability and if exists we must be aware of pricing assumptions used by market participants.
需要检查是否存在活跃市场的资产和负债，如果存在，我们必须意识到定价市场参与者所使用的假设。
While physicists have demonstrated entanglement with specially prepared atoms, no-one knows if it also exists between atoms making up human minds.
尽管物理学家已经证明了特制原子之间存在纠缠，但没人知道它是否也存在于组成人类思维的原子之间。
If only one album exists, I just take it.
如果只存在一个唱片，我就选择它。
If that exists, success will follow.
如果存在那种（条件），成功就是水到渠成的事。
If this difference exists, are there others?
如果存在这种区别，是否还有其他区别？
If no drainage system exists, the water table rises, bringing dissolved salts to the surface.
如果没有排水系统，地下水位就会上升，把溶解的盐带到地表。
"Now," says you, "that door exists, as plain as if I saw it."
“这样的话，”你说，“肯定有一扇门，就像就在我眼前一样。”
If the path already exists, it is not yours.
如果路已经存在，那也不是你的路。
If God exists, all depends on him and we can do nothing against his will.
如果上帝存在，一切皆取决于他，我们不能违背他的意愿。
If the key already exists, it will be updated.
如果键已经存在，那么它就会被更新。
If the schema already exists, it is dropped first.
如果这个模式已经存在，那么先删除它。
If the entry exists, it would be in the name service representation format.
如果条目存在，它应该是名称服务表示格式的。
If an entry exists, then delete the line containing the entry.
如果该条目存在，则删除包含的该条目的语句。
If no baseline exists, counters are relative to database activation.
如果基线不存在，计数器值相对于数据库激活时。
If it exists the new planet is so freezing cold it is difficult to spot, researchers said.
研究人员说，如果存在如此寒冷的新行星，那么将很难认出它。
If your God exists, he's smart enough to see through your fake ID.
如果你的上帝存在，他的智慧应该足以认出你那张假门票。
The first method opens the named record store if it exists.
如果指定的记录存储存在，第一个方法将会打开它。
If it exists, it could explain literally everything in the universe - from subatomic particles to the laws of speed and gravity.
如果这些弦真的存在，基本上就可以解释宇宙中所有的存在——从亚原子粒子到速度和重力定律。
If it still exists, it must be in someone's hands.
如果作品仍然存在，则必然在某一方手中。
The Higgs boson is a hypothesised particle which, if it exists, would give the mechanism by which particles acquire mass.
希格斯玻色子是一个假说中的粒子。如果它存在，我们就知道了赋予粒子以质量的物理机制。
Mars is a focal point in the quest to learn if life exists beyond Earth.
火星是研究地球以外是否存在生命的一个焦点。
If Nemesis exists, NASA's new WISE telescope should be able to spot it.
如果“复仇者”存在，美国太空总署最新的广角红外线探测望远镜(WISE)可能会发现它。
Second question, though, is: Does the soul, even if it exists, survive the destruction of the body?
第二个问题，如果灵魂存在，能否在身体毁坏后得以幸存？
Knowing if God exists, or not.
认知神的存在与否。
If it exists at all, it makes up about three-quarters of the stuff in the universe.
如果它真的存在，它会占据宇宙四分之三的物质。
If one exists, it is pulled and used.
如果存在，就将其调出使用。
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