第 44 课: 他们在看我们-1

Which animal always swims, never walks, and never flies? 哪种动物总是在游，从来不走，也从来不飞？

Which animal never swims, seldom walks, and flies a lot? 哪种动物从来不游，很少走，但是经常飞？

Which animal sometimes swims and sometimes walks, but never flies? 哪种动物有时游，有时走，但是从来不飞？

Which animal sometimes swims, sometimes walks, and sometimes flies? 哪种动物有时游，有时走，有时也飞？

The student doesn't understand the math problem. 学生不明白数学题。

The student asks the teacher, “Can you help me?” 学生问老师：“ 您能帮我吗？”

The teacher explains the math problem. 老师在讲解数学题。

Now the student understands the math problem. 现在学生明白数学题了。