payable on demand

例句：

1. 1. Thecompany is required to pay the taxes dueupon demand.
   公司被要求在需求时支付税款。
2. 2. The bank will pay the loan amountdue upon demand.
   银行将在需求时支付贷款金额。
3. 3. The seller is obliged to pay theprice due upon demand.
   卖方有义务在需求时支付价格。