Polyacetylenes
多炔
🗣️ 情景例句
Ellen reminds me so much of Grandma. Ellen
真让我想起奶奶。
Recently, I have learned a lot of new things about myself.
最近，我学到了许多自己以前不明白的事理。
Our foreign trade policy has always been based on equality and mutual benefit and exchange of needed goods.
我们的对外贸易政策一向是以平等互利、互通有无为基础的。