Alder
[ 'ɔ:ldə ]
第4级
其它 Other
n. 桤木;
📝 例句
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.
📖 牛津释义
alder
n
tree of the birch family, usu growing in marshy places 桤木（桦木科, 通常生长於沼泽地带）.
📖 同为「TOEFL」词汇
查看全部TOEFL词汇 ›🗣️ 情景例句
to serve the senior citizens
为Riverdale的老年人
It's nice to be sitting here with you.
在这里陪你坐着是非常愉快的。[动词不定式的进行时]
The system has worked so well, that it has been adopted in other countries too.
由于这种制度行之有效，已被其他国家采纳。