Normalnull ("standard zero") or Normal-Null (short N.?N.
双语例句
1
Second, a failed test should indicate that something unexpected happened (for example, a reference is null) and normal execution can't continue.
其次,失败的测试应当代表发生了意料之外的事(例如,引用为空),正常的执行不能继续。
2
Normal control characters (characters with values less than 32) : This especially includes character 0, traditionally called NUL; I call it NIL to distinguish it from c's NULL pointer.
Conclusion The activity of the histaminergic system decreased and the decrease might be one of the compensatory mechanisms for maintenance of the normal sleep in the null mice lacking DPR.