因此，对于多层“同心”容器内的测试，nose会在运行测试之前运行所有容器中的setup代码，在运行测试之后运行所有容器中的teardown代码。
For nose, therefore, a test lives inside of not one but a series of concentric containers, any of which can contain setup code that gets run before the test and teardown code that gets run afterward.
管状嵴的线粒体、多层同心环状的滑面内质网以及高尔基体较为常见。
The mitochondria with tubular cristae, multilayer concentric circular smooth endoplasmic reticulum, and golgi complexes are often observed.
块根在发育的初期具有类似“年轮纹路”的多层同心圆结构，当年产生，当年充实。
Its root tuber has multilayer concentric circularity similar to "annual ring lines" at the initial stages of development, and grows and enriches at the same year.
块根在发育的初期具有类似“年轮纹路”的多层同心圆结构，当年产生，当年充实。
Its root tuber has multilayer concentric circularity similar to "annual ring lines" at the initial stages of development, and grows and enriches at the same year.
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