Anionic cycloaddition
[化] 负离子环加成
🧩 词语组成解析
a. [化]阴离子的,带负电荷的离子的
n. [化]环加成( 指不饱和分子化合成一环状化合物的反应)
🗣️ 情景例句
You pick him up.
把他抱起来呀。
Sorry, but she is out.
很抱歉，她出去了。
Apparently what happened was that water collected on these tar pits, and the bigger animals like the elephants ventured out on to the apparently firm surface to drink, and were promptly bogged in the tar.
沥青坑里积存了水，大象那样的大动物冒险到似乎坚固的水面上去饮水，立即掉进了沥青坑。