Petrothene
一种聚乙烯
🗣️ 情景例句
The cradle will fall,
摇篮会掉落
Our service has been very well-received by our customers so far.
到目前为止，顾客对我们的服务质量评价甚高。
Two factors weigh heavily against the effectiveness of scientific research in industry.
两个因素严重地影响工业里科学研究的效果：