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柯林斯词典释义
英英词典释义
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alder是什么意思?
alder
英
[ˈɔ:ldə(r)]
美
[ˈɔldɚ]
n.
桤木
;
复数:
alders
;
相关单词
alderman
aldermanic
aldermanry
aldermanship
aldermen
Alderney
alders
balder
Calder
tag alder
例句
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.
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.
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.
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.
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.
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.
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.
查看更多关于 “
alder
” 的例句
柯林斯高阶英汉双解学习词典释义
N-VAR
桤木
An
alder
is a species of tree or shrub that grows especially in cool, damp places and loses its leaves in winter.
英英词典释义
Noun
1. wood of any of various alder trees; resistant to underwater rot; used for bridges etc
2. north temperate shrubs or trees having toothed leaves and conelike fruit; bark is used in tanning and dyeing and the rot-resistant wood
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