Under the epithelia is loose connective tissue whose chief elements are collagen fibers.

上皮下为疏松结缔组织，结缔组织的主要成分为胶原纤维。

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Prior to the use of wood fiber, the chief sources of fibers had been cotton an linen rag, with some straw being used.

在使用木材纤维之前，主要的纤维来源是棉布、亚麻布和一些稻草。

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Its chief USES are in packaging, carpet fibers, athletic surfaces, and a broad range of molded components.

其主要用途是包装、地毯纤维、运动场地和各种注塑组件。

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