These stacks of thylakoids are called grana.这些成堆的类囊体称为质体基粒.With the light microscope these stacks are just visible as grains ( grana ).可以用光学显微镜观察到这些堆积成颗粒状的物质 ( 质体基粒 ).The chloroplasts in the swamp reed were round - shape...
The cogs gear smoothly.齿轮啮合得很好.These executives, expert in every phase of corporation, became the indispensable cogs in the industrial machine.这些高层管理人员精通公司的各项业务, 成为整个工业机器中不可缺少的齿轮.Today's young people are being forge...