/hɑːrdər/
形容词
困难的,费力的
The topics get harder later in the course.
在以后的课程中题目会更难。
严厉的,苛刻的
The team received harder feedback than expected on their project presentation.
团队对他们的项目展示收到的反馈比预期的更为严厉。
想跟读,去练习