purchase
英 ['pɜ:tʃəs]
美['pɝtʃəs]
	    - n. 购买;紧握;起重装置
 - vt. 购买;赢得
 - vi. 购买东西
 
英英释意
- 1. the acquisition of something for payment;
 - "they closed the purchase with a handshake"
 
- 2. something acquired by purchase
 
- 3. a means of exerting influence or gaining advantage;
 - "he could get no purchase on the situation"
 
- 4. the mechanical advantage gained by being in a position to use a lever