单语范例（未经PONS编辑处理）
英语
- The cork cambium gives rise to thickened cork cells to protect the surface of the plant and reduce water loss.en.wikipedia.org
- Additional layers may be formed containing lignin in xylem cell walls, or containing suberin in cork cell walls.en.wikipedia.org
- As the stems grow a layer of cells form under the epidermis, called the cork cambium, these cells produce cork cells that turn into cork.en.wikipedia.org
- Cork cell walls contain suberin, a waxy substance which protects the stem against water loss, the invasion of insects into the stem, and prevents infections by bacteria and fungal spores.en.wikipedia.org
- At this point, the cork cambium begins to form the periderm, consisting of protective cork cells containing suberin.en.wikipedia.org
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英语