guarantee of due payment

例句：

1. 1. The company guarantees that the product will be delivered on time.
   公司保证产品将按时交付。
2. 2. He guaranteed his word and kept his promise.
   他信守承诺，兑现了他的诺言。
3. 3. The government guarantees citizens' rights to freedom of speech.
   政府保障公民的言论自由权。