吃透英语课本，提升在校竞争力
n. 保证；担保；保险；确信；自信
复数：assurances
‘Jack will never agree to that,’ he said with assurance.
“杰克绝不会同意的。”他肯定地说道。
Despite my repeated assurances, Rob still looked very nervous.
尽管我再三保证，罗布看起来还是很紧张。
the calm assurance with which she handled the horse
她对付马儿时的从容镇定
life assurance
n. 人寿保险；（保险公司付给的）人寿保险金；（被保险人缴纳的）人寿保险费
quality assurance
质量保证；品质保证
assurance company
保险公司
assurance coefficient
安全系数，保险系数；保证系数
n.保证；保险；确信；断言
certification
insurance
commitment
guarantee
safety
