重 点
Something that is hard is very firm and stiff to touch and is not easily bent, cut, or broken. 坚硬的
adjective [原级] 硬的，坚固的；困难的；猛烈的，用力的；困苦的，艰苦的；努力的；冷酷的，心肠硬的；严厉的，苛刻的；（政党内部派别）极端的，固执己见的；（季节，天气）严酷的，凛冽的；（水）硬的；坚强的，勇敢的；刺目的，令人不快的；确凿的，可靠的；（学科）实证的；硬（科幻）的；酒精含量高的，烈性的；（尤指葡萄酒因含有单宁酸而）苦涩的；（毒品）毒性强的，易上瘾的；（辐射）穿透力强的
Something that is hard is very difficult to do or deal with. 困难的
adverb [方式副词] 努力地，费力地；用力地，猛烈地；仔细地，认真地；沉重地，大量地；变硬；在最大程度上
If you work hard doing something, you are very active or work intensely, with a lot of effort. 努力地
- hard 出现在下面的课文中（提供视频、音频及笔记等可系统性学习）
- Lesson 037&38 Making a bookcase hard 副词: 努力地
- Lesson 103&104 The French test hard 形容词: 硬的
- Episode 7 Man's Best Friend ACT II hard 形容词: 困难的
- Lesson 17&18 How do you do?
- Lesson 8 The best and the worst
- Lesson 10 Not for jazz
- Lesson 30 Football or polo?
- Lesson 31 Success story
- Lesson 52 A pretty carpet
- 网友用 “Hard” 造句精选
- California's been particularly hard hit by the recession. 加利福尼亚受到经济衰退的影响尤为严重。
- He shuffled his feet on the hard wooden floor. 他拖着脚走在坚硬的木地板上。
- His father was a hard man. 他父亲是个冷酷无情的人。
- The grey light was hard on the eyes. 昏暗的光线使眼睛很难受。
- He succinctly summed up his manifesto as "Work hard, train hard and play hard." 他把自己的宣言简明地概括成了“努力工作，努力训练，努力玩耍。”
- Coping with three babies is very hard work. 照顾3个小宝宝是件很累人的活儿。
- He then graduated from soft drugs to hard ones. 他随后从服用软性毒品逐步发展到服用烈性毒品。
- It might be worth taking a long hard look at your frustrations and resentments. 也许值得对你的挫折感与愤懑做仔细的分析。