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1·The endangered Asian elephant enjoys Class-A protection in China, the same level as the giant panda does.

濒临灭绝的亚洲象在中国享有一级保护，与大熊猫的保护级别一样。

2·It always takes the class a while to settle down at the start of the lesson.

那个班一上课总得过一会儿才能安静下来。《牛津词典》

3·One day after class, a student came up to me and recommended traditional Chinese medicine.

有一天课后，一个学生找到我，并向我推荐了传统中医。

4·The authorities have placed the drug in Class A, the same category as heroin and cocaine.

当局已把这种毒品定为A级，与海洛因和可卡因属同一类。《柯林斯英汉双解大词典》

5·As Lawrence James says about the British variety in The Middle Class: A History, they are a sprawling, untidy organism in a perpetual state of evolution.

正如劳伦斯·詹姆斯（Lawrence James）在他的《中产阶级：一段历史》(the Middle Class: A History)中对英国多样性的描述，他们是“一个不断进化的、杂乱无章的有机体。

6·I recently gave my class a task.

我最近给我的班级布置了一个任务。

7·All airspace above 5,490m is designated Class A.

5490米以上空域定为 A 级空域。

8·Mr. Mason, can I ask the class a question? Lisa asked.

“梅森先生，我能问全班同学一个问题吗？”丽莎问道。

9·In class, a teacher may ask students to raise their hands before they speak.

在课堂上，老师可能会要求学生在发言前举手。

10·The reason for the division of Class E and Class A airspace stems from the type of planes operating in them.

E 类和 A 类空域的划分取决于在这两类空域飞行的飞机类型。