A long-standing theory that historically lower suicide rates seen among married versus unmarried women reflects a "protective effect" of motherhood, rather than advantages of marriage perse.

长期以来的理论表明，从历史上看，已婚女性的自杀率低于未婚女性，这反映出“母亲”这一身份的“保护性效应”，而并非是婚姻本身。

youdao

Research on the basic theory and design principles of fire resistance, wind resistance and earthquake resistance in civil engineering and landslides, protective measures and prediction technology.

研究土木工程中的防火、防风、防震、滑坡等的基本原理，设计原理，防护措施及预测、预报技术。

youdao

According to protective principle, laser protective materials can be divided into the materials using liner optical theory and the material using nonlinear optical theory.

按照防护原理，可将激光防护材料分为基于线性光学理论的防护材料和基于非线性光学理论的防护材料。

youdao

Schenk also dismissed the theory from Case Western Reserve Researcher Mark Smith that amyloid is protective and involved in wound healing.

FORBES: Elan Defends Alzheimer's Science

One theory is that sensitivity to bitter flavor could have evolved as a protective mechanism against poisonous plants.

WSJ: People Who Taste Too Much