有奖纠错
| 划词

The effects of different concentrations of arsenic on spore germination and rhizoid and prothallium growth of Pteris vittata under aseptic condition were studied.

研究无菌条件下不同浓度砷对蜈萌发、假根和原叶体生长发育影响。

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山美地

The most important of the larger species are woodwardia, aspidium, asplenium, and, above all, the common pteris.

较大的物种中最重要的 woodwardia、aspidium、asplenium,

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山美地

The broad-fronded, hardy Pteris aquilina, the commonest of ferns, covers large areas on the floor of the Valley.

宽叶、耐寒的类植物 Pteris aquilina 最常见的类植物, 覆盖了山谷底部的大片区域。

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3G, 401(K), a,
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