如何理解这句话里whichthere are some countries such as Denmark,Finland,Italy,Turkey,Australia,and Belgium which also celebrate Mother's Day on the second Sunday of May.

如何理解这句话里whichthere are some countries such as Denmark,Finland,Italy,Turkey,Australia,and Belgium which also celebrate Mother's Day on the second Sunday of May. 如何理解这句话 如何理解这句话里的 thenHello ,sam have a cigarette No,thanks ,tomHave a glass of whisky then . 如何理解为人民服务这句话 如何理解”知识就是力量”这句话 如何理解“君子之交淡如水”这句话? 如何理解”隔行如隔山“这句话 如何理解“难得糊涂”这句话? 这句话里的What如何理解.What we often forget is that we all need a joy,a light in a dark day. 如何理解“老人种了一辈子树,把自己也种进了树里”这句话? 如何理解”二十四个循环往复的节气里,有你恒温的气节“这句话? “百里不同风,千里不同俗”如何理解这句话 怦然心动如何理解?（怦然心动）这句话如何理解? 如何理解“世界上没有的一切也在书里,把宇宙放在书里还有富余”这句话. 如何理解“混乱即秩序”这句话? “优点就是缺点”这句话如何理解? 我们应该如何理解“一诺千金这句话?” 如何理解磨刀不误砍柴工这句话的含义?