You're not supposed to walk on the grass.

　　不準(zhǔn)踐踏草地。

　　He lay back on the grass using his backpack as a pillow.

　　他用背袋當(dāng)枕頭仰臥在草地上。

　　The city and the Commonwealth have lost a great leader.

　　這座城市和這個(gè)州失去了一位偉大的領(lǐng)袖。

　　Their contribution was of great worth.

　　他們的貢獻(xiàn)具有偉大的意義。

　　She moves with the natural grace of a ballerina.

　　她的動作具有芭蕾舞演員自然優(yōu)雅的豐姿。

　　Ballet classes are important for poise and grace.

　　芭蕾課可以很好地使人保持優(yōu)雅的儀態(tài)。