另外还需要注意，Root是泛型的(实际上每个表达式都是泛型的)。
Also notice that Root is generically typed. (Actually, every expression is.)
原因4：泛型支持和原因5：Lambda表达式支持。
诱导型基因表达系统已成为基因工程和病理学研究的重要工具。
Inducible gene expression system has become an important tool for genetic engineering and pathophysiologic studies.
ST呈强阳性表达，其表达形式为胞浆型；
The expression of ST showed strong positive, and plasma type;
ST呈强阳性表达，其表达形式为胞浆型；
The expression of ST showed strong positive, and plasma type;
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