在那里，人们用有波纹的铁板围起来当墙，这些铁板都是新的，闪闪发亮的，还用椰子叶盖在上面当房顶，就这样建起了一座学校。
One school is built from shiny new corrugated iron and a roof thatched with coconut leaves.
胚有两片大而肉质的子叶。
在单子叶的水稻和双子叶的烟草之间该基因有很高的同源性。
It reserves a high homo- logy between rice, monocotyledonous plant and tobacco, dicotyledonous.
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