puts and calls

puts and calls 什么叫calls和 puts? short calls和long puts分别怎么理解? linda calls peter again and It dries them and puts them away. She calls it again and again. He puts his ( )and ruler on me and puts his ( )under me.the( 芝加哥期货中Calls和Puts是啥意思?还有哪里可以看到芝加哥黄金空头和多头持仓量, He puts on his clothes and washes中的washes是什么意思 The boy is careless and always puts his keys e____ and puts small presents in their stockings 翻译顺 My father puts on his coat and went out