Sunspots are dark patches marking magnetically active regions that often host solar flares and violent belches called coronal mass ejections.
黑子是太阳表面比较暗的区域，也叫活动区。那里经常发生耀斑和日冕物质抛射等剧烈的喷发现象。
In the bird embryo these bristles erupt from tiny patches of skin cells called placodes. A ring of fast-growing cells on the top of the placode builds a cylindrical wall that becomes a bristle.
鸟胚中的刚毛结构来自于被称为基板（placode）的微小皮肤细胞结构，基板顶端快速增殖的细胞环形成了刚毛的圆柱井结构。
The system running inside the emulator (called the guest system) won't need any modification (or at most, a few patches to guarantee that the OS works smoothly).
运行于模拟器中的系统（称为客户系统（guestsystem））不需要任何修改（或者，最多需要一些保证OS 平稳工作的补丁）。
The inner ear is composed of delicate membranes which bear dense patches of specialized cells called maculae.
内耳由脆弱的薄膜构成，它承载着密集的由被称作斑疹的特殊细胞构成的片。
The inner ear is composed of delicate membranes which bear dense patches of specialized cells called maculae.
内耳由脆弱的薄膜构成，它承载着密集的由被称作斑疹的特殊细胞构成的片。
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