I will remember this happy event as long as I live.

在我的有生之年，我将记住这幸福时刻。

Happiness means different things to different people.

对不同的人来说，幸褐有不同的含义。

Happiness could not be bought with money.

幸福不能用金钱买到。

For me, my happiness is closely tied to my family.

对我来说，幸福就是紧紧地和家人联系在一起。

I will never forget the day that event happened.

我永远不会忘记事情发生的那一天。

As the saying goes, extreme joy begets sorrow.

俗话说，乐极生悲（极度的快乐带来痛苦）。

Those who are easily content are always happy.

知足常乐（容易满足的人始终幸福、快乐）。

Happiness should not be achieved at the expense of others' interests.

幸福不能建立在别人的痛苦之上（幸福不能以别人利益为代价而获得）。

For me working is the source of happiness.

对我来说，工作是快乐之源。

I was having the time of my life.

我当时活得很快乐。

We had a whale of a time at that party.

我们在聚会上玩得很开心。

When I heard the news I was as happy as a lark.

听到这个消息，我高兴极了。