promise和ensure 和assure和ｄｅｃｌａｒｅ的区别
1:promise的主要意思是承诺，举例句 I will call you back,I promise. ; 2:ensure的主要意思是确保，保证，举例句 We tried to ensure that everyone got a fair deal. ; 3:assure的主要意思是使…确信，举例句Victory would assure a place in the finals. ,4:ｄｅｃｌａｒｅ的意思是宣布，申明，举例句:I ｄｅｃｌａｒｅ this festival...