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- He vowed to study hard. （他立誓要用功读书。）
- He vowed to kill his wife's lover. 他发誓要杀死妻子的情夫。
- He vowed to himself to avenge his martyred comrade. 他暗暗发誓要为牺牲的同志报仇。
- He vowed to work harder in the future. 他发誓将来要更努力工作。
- Our teacher gives us exhortation to study hard. 我们的老师规劝我们好好学习。
- He vowed to attain the goal at any price. 他誓言要不惜任何代价达到这个目标。
- He vowed to hunt down the murderer. 他发誓要找到凶手。
- He vowed to work for a better world. 他发誓要为建立一个更美好的世界而奋斗。
- He pledges his word to study hard . 他发誓要努力学习。
- He pledges his word to study hard. 他发誓要努力学习。
- My teacher gave me a great deal of advice; he said to study hard . 我的老师给了我许多忠告，他说应该用功读书。
- We must make a resolution to study hard. 我们必须下定努力学习的决心。
- He vowed to look after his mother when his father died. 他发誓在父亲死后照顾母亲。
- Peter, my English teacher, never fails to encourage us to study hard. 我的英文老师彼得总是鼓励我们要好好用功。
- After his release from prison,he vowed to live down his crimes. 他从狱中被释放以后，便发誓要改过自新。
- You must study hard if you want to study well. 如果你想学习好，你就得努力学习。
- After his release from prison, he vowed to live down his crimes. 他从狱中被释放以后，便发誓要改过自新。
- If you want to study well, you must study hard. 如果你想学习好，你就要努力学习。
- It's necessary for us to study hard . 我们必须努力学习。
- Henney has vowed to study Korean hard and become active as a "true Korean". 海尼发誓一定要努力学习韩语，成为一个“真正的韩国人”。
