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
How ofter have met with our competitors?
你多久遭遇我们的竞争对手一次？
How fierce can a lion be without his teeth?
没有牙的是狮子也可怕吗？
No! I mean, have you seen how dirty the water is? It looks as if it isn' t clean enough to bathe here.
不！我的意思是您有没有看见海水有多脏？看起来海水好象不干净，不能游泳。