例句
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The microorganisms involved in symbiosis with the alder tree are actinomycetes of the genus Frankia.
而与赤杨共生的微生物是放线菌.
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Diels - Alder reaction of 2 - merhylene - 1 - pheny 1 - 1.3 - butanedione catalysed by zinc chloride as lewis acid with 1.3 - cylcopentadiene was reported.
以氯化锌为路易斯酸催化剂,探讨了2 ─ 亚甲基─1 ─ 苯基 ─ 1.3 ─ 丁二酮与1.3 ─ 环戊二烯的Diels─Alder反应.
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Alder ( Alnus nepalensis ), an important non - legume nitrogen - fixing plant, occurs widely in the eastern Himalayas.
桤木 ( Alnusnepalensis ) 是一种重要的 非 豆科固氮植物, 广泛分布于喜马拉雅山脉东部地区.
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They were principally used to catalyze aldol, allylation, Diels - Alder, ene and Friedel - Crafts reactions.
它们主要被用来催化Aldol, 烯丙基化, Diels-Alder, Ene和 Friedel -Crafts等反应.
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Its name is Ben Alder , it is a wild , desert mountain full of hills and hollows.
它的名字是本·亚尔德, 是一座尽是些山岗和鸡谷的漠无人烟的荒山.
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The meanders of a prattling brook, were shaded with straggling willows and alder trees.
一条小河蜿蜒掩映在稀疏的柳树和桤树的树荫间,淙淙作响.
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Modification for synthetic purposes on the Diels - Alder adducts 56 and 62 has only rarely been considered.
为了达到合成的目的,对Diels-Alder加 成物(56)和(62)加以改造的问题很少有人考虑.