Occluding
a. [醫]牙合的, 咬合的\\nv. 堵塞( occlude的現在分詞 ); 阻隔; 吸收（氣體）
??? 情景例句
They hardly ever see each other.
他們幾乎彼此不碰頭。
Do you have a letter of introduction?
你有介紹信嗎？
Behind the house there is a tree.
房子后面有一棵樹。