principal instalments的用法和樣例：
例句
- Under normal circumstances, the banks will offer the applicants a six-month grace period for repayment of the loan principal.
銀行通常會給予申請人六個月償還貸款本金的寬限期。 - Whatever unspent household income on each and every day could be utilised for reducing the loan principal and paying interest.
每日帳戶內未動用的家庭收入都可以用作減低貸款本金及支付的利息。
