be friendly to sb
be friendly to sb : 对某人友好 be fiendly towards sb : 对某人友好 以上两种用法意思相同。 To make friends, you must be friendly to others. 为了交朋友，你必须多别人友好。 He is friendly to us. 他对我们很友好。
mountain
mountain : n. 山; 高山; 许多; 大量; 山岳; Two men were frozen to death on the mountain. 两个男子在山上冻死了。 复数：mountains 其他语法： a mountain of / mountains of : 大量的 a mountain of work 大量的工作 We made mountains
everyone
everyone: pron(介词). 每个人; 所有人; 人人; 每人; 做主语时，谓语动词用三单。 Everyone has a chance to win. 每个人都有机会赢。
at the age of...
at the age of… : 在…岁时。 At the age of five he showed exceptional talent as a musician. 他五岁时就表现出非凡的音乐才能。 He was killed in a tragic accident at the age of 24. 他24岁时在一次悲惨的事故中丧命。
country
country：n. 国家，乡下。复数 countries。 如：It was a new era in the history of our country. country: adj. 乡村的，地方的。 如： country music
complete，completely
complete：adj. 完全的，完整的。如：a complete story complete：v. 完成=finish。如：I completed my homework completely：adv. 完全地，彻底地。如：I completely forgot your birthday
