字符串

Its a good idea to check for null object reference to prevent NullReferenceException when it comes to objects but in case of Strings sometimes you get a string without any value or called as Empty string.

它的一个不错的主意，以检查空对象引用，以防止NullReferenceException时候，但物体的情况下弦乐有时你一个字符串没有任何价值或称为空字符串。

The string pointers in the structure may point to a null string which indicates that the value is not available.

结构体中的字符串指针可能指向一个空字符串，这表明此值不可用。

The local part is a string. The namespace URI is either null or a string.

局部名称是一个字符串，命名空间 uri 或者是 null 或者是一个字符串。

Pointer to a null terminated string that can specify the initial directory.

指向以空字符结束的字符串，可以在这个字符串中指定初始目录。

Dimensions the array to 4 (just long enough to hold the string plus a null character), and stores the string in the array.

定义数组的尺寸是4（长度仅仅够容纳字符串和一个空字符），并把字符串存储在数列中。

If a string-based field has null=True , that means it has two possible values for "no data": NULL , and the empty string.

如果一个基于字符串的字段类型设置了 null=True，这就意味着有两种可能的值用于表示"没有数据"：NULL 和空字符串。

For example, consider the following small problem: You have a list of numbers and a string of characters; you would like to construct a list of all pairs that consist of a number from the list and a character from the string, but only if the ASCII ordinal is larger than the number.

比如，考虑下面这个简单的问题：你有一个由数字组成的列表和一个由字符组成的字符串；你要构建另一个列表，它的元素就是列表中一个数字和字符串中一个字符的配对，而这个字符的 ASCII 码必须比这给数字大。

New directories inherit the mode of the parent directory, including bits such as setgid.

这个选项的内容是一个接口字符串的列表，每个字符串可以是下列任何一种格式

The value changes for your program only, not for GDB itself. value may be any string; the values of environment variables are just strings, and any interpretation is supplied by your program itself. The value parameter is optional; if it is eliminated, the variable is set to a null value.

这个改变只针对你的程序，不影响 GDB 本身。value 可以是任何字符串，环境变量的值仅仅是字符串，任何解释都是你的程序自己的。value 参数是可选的，如果没有，变量会设为空值。

That means finding a way to look at a string and determine if it's a valid Roman numeral.

这意味着要找出一个方法查看输入字符串并确定它检查一个字符串是不是一个有效的罗马数字。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。