Hydropolymerization
氢化聚合作 用
🗣️ 情景例句
Please send me a post card.
记住给我寄名信片。
Excuse me, would you give me a hand?
对不起，你能帮我个忙吗？
and the search for oil has done more to improve deep drilling than any other mining activity.
寻找石油比其他任何采矿业对改进深孔钻探作的贡献都要大。