threshold substance

Above this restriction threshold the substance is restricted and declaration of the substance is obliged.

超过这一限制门槛的,实质是对于限制和宣言的实质都是责任.

Diagnostic Value of Ultrasonography for Observing Endometrial Thickness and Three-line Pattern in Ectopic Pregnancy Expression of substance P in endometrium from endometriosis model rats and the changes of pain threshold before and after operation

超声子宫内膜厚度及三线征变化在宫外孕诊断中的价值P物质在子宫内膜异位模型大鼠子宫内膜组织中的表达及造模前后痛阈的变化

In this paper, the stability condition of optical resonator is introduced, the power losses of stable resonator and the threshold condition of optical oscillation is discussed, and the formulation of the relationship between the gain coefficient of work substance and the losses factor is derived.

本文对光学谐振腔的稳定条件做了介绍，并讨论稳定谐振腔的功率损耗和光振荡的阈值条件，导出了工作物质的增益系数与损耗因子的关系式。

Expression of substance P in endometrium from endometriosis model rats and the changes of pain threshold before and after operation

P物质在子宫内膜异位模型大鼠子宫内膜组织中的表达及造模前后痛阈的变化