叠: Ⅰ动词1.(一层加上一层; 重复) pile up; repeat 短语和例子层峦叠嶂 peaks rising one higher than another; 一个一个往上叠 pile one above another2.(折叠) fold 短语和例子把信叠好 fold the letter; 叠被子 fold up a quilt; 这些轻便折椅可以叠起来放进汽车。
绕流: streaming; flow around a body; [流] flow over a body◇绕流管 [建筑] by-pass; 绕流区 periptery
