A third party class must be rewritten to extend only from the abstract class.
第三方的类必须被重写，只能从抽象类继承。
In addition, a wide variety of third-party class libraries are available on the Internet.
此外，在Internet上还提供了多种第三方类库。
让我们举行一场班级聚会。
Two hours ago you went to attend the class party in high spirits.
两个小时之前你欢欢喜喜的出去参加同学聚会了啊。
Take a dance class or invite your friends over for a mini dance party.
参加舞蹈课，或者邀请你的朋友来一场小型的跳舞聚会也是一个不错的锻炼方法。
On New Year's Eve, our class had a party.
每年的新年前夕，我们班举行了一个聚会。
On New Year's Eve, our class had a party. The atmosphere was good.
在新年前夕，我们班有一个聚会。气氛很好。
On New Year's Eve, our class had a party.
在除夕，我们班有个聚会。
In the garden, those diligent and smart students of our class are having a party.
在花园里，我们班的那些勤奋聪明的学生正在举行晚会。
On New Year's Eve, our class had a party.
在新年前夕，我们班有一个聚会。
I am going to invite the whole class to my birthday party.
我要邀请全班来参加我的生日派对。
Party activists with lower middle class pedigrees are numerous.
党内积极分子中中产阶级下层出身的很多。
是班级聚会。
The whole class are having a party.
全班同学正在举行晚会。
"He looked at us and said:" the second class open party!
他看了看我们，又说：“第二节课开联欢会啊！”
Let's have a class party this Saturday!
这周六，让我们来举行一个班级晚会吧！
I went to one stuffy upper class dinner party on my first night.
第一天晚上我去参加了上流社会的一个无聊的晚餐会。
The entire class turned out for the graduation party at the beach yesterday.
昨天全体同学都参加了在海边举行的毕业派对。
The official start of the second class, party finally.
第二节课，联欢会终于正式开始。
If we have the party tomorrow, half the class won't come.
如果我们明天开聚会，半个班都到不了。
If we have the party tomorrow, half the class won't come.
如果我们明天开聚会，半个班都到不了。
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