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
This could be your lucky day.
今天你要时来运转了。
I'm sorry I'm late. I overslept again.
抱歉我来晚了。我又睡过头了。
But having satisfied the requirements of practical necessity, most people go no further.
但是，大部分人在满足了实际需要后，就不再继续发展这种能力了。