"A sweet temper" is a figurative expression, but "sweet coffee" is not. "甜蜜的性情"是个比喻的说法，而"甜咖啡"则不是。
You should repay principal and interest. 你必须偿还本金和利息。
They obligate the borrower to pay the owner interest during the term of the loanfnd to return the principal or face value, when the loan kmatures. 他们赋予借款人在贷款期限内支付持有人利息并在贷款到期后偿还本金或面值的义务。
