Declaration of death and testate succession are two kinds of legal system about death.

宣告死亡和遗嘱继承是关于死亡的两种法律制度.

Profound researches carried out in European anti North American countries have demonstrated that testate amoebae are excellent indicators for paleoenvironmental changes.

在欧洲和北美开展的大量研究已证实有壳变形虫是古环境变化的有效指示器。