Heptanedioic acid
[化] 庚二酸
🧩 词语组成解析
🗣️ 情景例句
What do you do at Universe Toy Company?
你在宇宙玩具公司做什么工作？
We want to purchase Chinese tea. Please send us your best offer by fax indicating origin packing, quantity available and the earliest time of shipment.
我们欲购中国茶。请用电传给我们报最好价，并说明产地、包装、可供数量及最早发货日期。
and we control it by means of the mud which we circulate down the drill pipe.
我们让泥浆顺着钻杆向下循环，用这种方法来控制压力。