Votator
螺旋式换热器; 螺旋式热交换器
🗣️ 情景例句
Practice tenses as much as possible.
操练各种时态。
Do you offer FOB or CIF?
你们报船上交货价还是到岸价？
Where's Sandra, Bob?I want her.
鲍勃，桑德拉在哪儿？我要找她。