以下是一些磨練英文的佳句：
1. Practice makes perfect. 熟能生巧。
2. Success is not final, but failure is not fatal. 成功不是終點，失敗也不是致命的。
3. Courage is not the absence of fear, but the ability to act in spite of it. 勇氣不是沒有恐懼，而是在有恐懼的情況下採取行動的能力。
4. Simplicity is the ultimate sophistication. 簡單是終極的複雜。
5. Life is like a box of chocolates, you never know what you're gonna get. 生活就像一盒朱古力，你永遠不知道你會得到什麼。
6. Opportunity seldom knocks more than once before you open the door. 機會敲門一次只敲一次，如果你開門慢了，它就會走了。
7. Wisdom in the mind is better than money in the hand. 腦中有智慧勝過手中有金錢。
8. A life without a sense of humor is like a sunny day without warmth. 沒有幽默感的人生就像沒有暖和的陽光的晴天。
9. Happiness is not something to run after, it's something to find within. 幸福不是去追那些想要的，而是要發現的。
10. Life is like a book, you don't judge a book by its cover, but by its content. 生活就像一本書，你不會因為封面而評判它，而是通過內容。
希望這些句子可以幫助你磨練英文能力。