Polyacetylenes
多炔
🗣️ 情景例句
I have received the secretarial training for six months.
我曾接受过6个月的秘书训练。
Poor without debt is better than a prince.
穷人无债胜王子。
Henry Taylor, he went offimmediately to visit him,
亨利·泰勒，就立刻跑去看他，