1. vt.确保…，担保　 make (sth) certain to happen
2. vt. & vi.使安全　 make sb secure

　～ the completion of the work　保证完成工作
　～ a good night's sleep　保证某人能睡一夜好觉
　～ good quality　保证优质
　～ the implementation of a policy　保证政策的执行
　～ a job　保证某人有工作
　～ the material basis for the war　保证战争的物质基础
　～ normal operation　保证正常运作
　～ peace　保证和平
　～ people's health　保证人们的健康
　～ safety　保证安全
　～ a stable livelihood　保证安定的生活
　～ success　确保（某人）获得成功
　～ victory　保证胜利
　～ against　使安全，保护…免受
　～ against diseases　防止疾病
　～ for sb a voice　确保某人有发言权
　～ success for sb　确保某人成功
　～ from　使安全，保护…免受
　～ from harm　保护某人免受伤害

　A good irrigation system is very important to ensure a higher yield.　良好的灌溉系统对保证高产是很重要的。
　Several days' notice is advisable to ensure a flight on the day requested.　要买到所需的某日机票，宜提前几天通知。
　Preparedness ensures success.　有准备，成功就有保证。
　Supplies can be ensured only through economic development.　只有发展经济才能保障供给。
　What can you do to ensure that you will stay healthy?　你有什么办法保证你会健康永驻吗?
　His help ensure that we were successful.　他的帮助保证了我们成功。
　We took steps to ensure that rules should be faithfully carried.　我们采取了措施，以确保这些规章会不折不扣地得到贯彻。
　If you want to ensure that you catch the plane, take a taxi.　你要想确保能赶上那班飞机，就坐出租车去吧。
　I can't ensure that he would be here in time.　我不能保证他能及时到达这里。
　This medicine will ensure you a good night's sleep.　这药保证能让你睡一夜好觉。
　Knowledge alone can't ensure you a success.　只有知识还不能确保你获得成功。
　These arrangements would ensure them a reasonable income.　这些安排会保证他们得到合理的收入。
　This arrangement will ensure a large income for you.　这个安排保证将给你带来一大笔收入。
　Your experience in teaching will ensure a post for you.　你的教学经历肯定能使你谋求到一个职位。
　Adequate rest is ensured for every student.　保证每个学生得到充分休息。

 ♣ ensure against　(v.+prep.)
　保护…免受（某种）危害，防止，防备　(cause to) be protected against (sth bad)
　You should ensure against loss of heat by having double glazing.　你应装双层玻璃以免散热。
　There must be safety devices to ensure workers against accidents.　一定要有保护工人避免工伤事故的安全装置。
　Vaccinations ensure one against diseases.　接种可以预防疾病。
　We must ensure our children against contamination by bad ideas.　我们必须保护我们的儿童不受坏思想的侵蚀。
　Carefulness ensures you against errors.　工作仔细可使你不出差错。
　Proper clothing ensured us against suffering from the cold.　衣服穿得合适，我们就不会挨冻。
 ♣ ensure from　(v.+prep.)
　保护…免受危险　protect sth from avoid-ing the danger
　No one can ensure you from failure.　没有人能保证你不会失败。

 ♣ ensure, assure, insure, secure
　这组词的共同意思是“保证”。其区别是：ensure强调使人确信某个行为或力量产生的后果；insure指保险公司对于财产、货物或人身安全的保险；assure通常指消除某人思想上的怀疑或担心；secure指采取使人感到安全、安心或可靠的行动。