The key to success is preparation.

　　成功的關(guān)鍵是準備。

　　Preparation for the party started early.

　　聚會(huì )的準備工作很早就開(kāi)始了。

　　With all the lesson preparation I have to do I work 12 hours a day.

　　加上必須的備課在內，我每天工作12個(gè)小時(shí)。

　　Careful preparation for the exam is essential.

　　認真準備考試十分必要。

　　She stressed the importance of careful preparation.

　　她強調了認真準備的重要性。