alder造句
2024年06月15日 15:02:52
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.
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.
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.
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.
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.
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.
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.