- The mechanical tissue flakily situated in the downside of the main vein and the bigger lateral veins.
机械组织成片存在于主脉和较大侧脉靠下表皮侧。 - The mechanical tissues were mainly composed of fibre, flakily situated in the tops and bottoms of most veins.
由纤维组成的机械组织，成片存在于绝大多数叶脉的上下方。
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