查询词典 Nil

The target and action of the back bar button item you set should be nil.

那么这个按钮的target和action你需要设置成nil。

But a young man should be ambitious to shine, and excel; alert, active, and indefatigable in the means of doing it; and, like Caesar,'Nil actum reputans, si quid superesset agendum.

而年轻人就应当胸怀超凡出众之心，机警、活跃、不屈不挠地为之奋斗。应像凯撒那样，'Nil actum reputans， si quid superesset agendum。'（一事未完，便当一点未做。

List, and the cdr points either to another cons or to nil.

的一个元素，cdr指向另一个cons或者nil。

The predeclared identifier nil is assignment compatible with any pointer, function, slice, map, channel, or interface type and represents the zero value for that type.

提前声明的标识符nil是一个与任何指针，函数，slice，map，channel或者接口类型兼容的，表示那些类型的值为0。

If this property is nil, the picker is dismissed immediately if you try to show it.

如果这个属性是nil，那麼在显示选取器的时候他会马上消失。

If an argument is given, it will be returned from the method call, otherwise nil is returned.

如果给出一个参数，那么将从调用的方法中返回，否则返回nil。

By controlling the potential of the electrolyte solutions,this technique can be employed in studies formation of DNA strand breaks.CT-DNA was cleaved by adding amounts of CuL or NiL complex in the absence of chemical reagent when appropriate electrode potential(sufficiently negative or positive to reduce or oxidate metal ions) was applied.

根据获得的实验结果，CuL或NiL存在下，电解溶液的电位合适时(足够负或足够正的电位，保证金属离子的还原或氧化)，不需要加入额外的氧化剂或还原剂，同样可以切割小牛胸腺DNA，CuL劈裂能力强于NiL配合物。

In addition, the component often re-instantiates its subcomponent when the property is set to nil.

另外，当属性设置为 nil 时，组件总是重新例示它的子组件。

If you allocate a reference object with new, you receive a pointer to a nil reference, equivalent to declaring an uninitialized variable and taking its address.

如果你使用new分配了一个引用对象，你将会得到一个指向nil引用的指针。这个相当于声明了一个未初始化的变量并取得它的地址。

Because a constructor sets the fields of a new object to zero or empty values before performing other actions, class-type and pointer-type fields in a partially constructed object are always nil. A destructor should therefore check for nil values before operating on class-type or pointer-type fields.

因为构造函数在执行其它动作之前先设置新对象的字段为 0 或空值，在一个只构建了一部分的对象中，类类型和指针类型的字段总是 nil，所以，在操作类类型和指针类型的字段时，析构函数必须检查它们是否为 nil。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。