pition 仓位/头寸 :如bear position，空头头寸 demand 需求 :An economic principle that describes a consumer’s desire and willingness to pay a price for a specific good or service. Holding all other factors constant, the price of a good or service increases as its demand increases and vice versa. deposit 存款/保证金：1. A transaction involving a transfer of funds to another party for safekeeping. 2. A portion of funds that is used as security or collateral for the delivery of a good. Vehicle （金融）工具 currency 通货/货币：例:The Japanese yen is one of the stronger currencies in the world