null

adj.

零值的；等于零的；（协议） 无法律效力；失效的

null and void无效的

null hypothesis零假设；虚假设；解消假设

null space零空间

null value空值

null pointer空指针

null string空行；空串

1. Their actions rendered the contract null and void.
   他们的行为使合同无效。
2. The marriage was declared null and void.
   婚姻已宣告无效了。

1. The path must end with a null character.
   该路经必须以零结尾。
2. Vomit in null gravity wouldn't be fun.
   如果在零重力下呕吐了可不是件好笑的事。
3. A null reference pointer was passed to the stub.
   向占位程序传送了空的索引指针。
4. Primary keys do not allow null values.
   主键不允许空值。

Null Hypothesis Testing: Problems, Prevalence, and an Alternative
Microsatellite null alleles and estimation of population differentiation.
Estrogen receptor null mice: what have we learned and where will they lead us?
The file drawer problem and tolerance for null results.
Mice carrying null mutations of the genes encoding insulin-like growth factor I (Igf-1) and type 1 IGF receptor (Igf1r).
Inference When a Nuisance Parameter Is Not Identified Under the Null Hypothesis
Transforming growth factor beta 1 null mutation in mice causes excessive inflammatory response and early death.
Erratum: Estrogen receptor null mice: What have we learned and where will they lead us? (Endocrine Reviews (June 1999))
Testing the null hypothesis of stationarity against the alternative of a unit root ☆ : How sure are we that economic time series ha...
Molecular heterogeneity of complement component C4-null and 21-hydroxylase genes in systemic lupus erythematosus