earth /ə∶θ/ n. 1.地球(加the): The moon circles the earth. 月亮绕地球转。2.［u］土，泥: The earth in the garden is good soil. 花园里的土肥沃。 3.陆地：the earth, the sea, and the sky 陆海空 4. 用于习语：on earth(常用在疑问词，最高级后加强语气)究竟：What on earth is it? 它究竟是什么东西? Einstein was the greatest scientist on earth. 爱因斯坦是最伟大的科学家。
earthquake /ˈə:θkweik/ n. ［c］ 地震：feel an earthquake 感到地震；buildings to withstand earthquake 抗震的建筑；predict earthquake 预报地震 If an earthquake comes/happens, this roof will fall. 要是发生地震，这屋顶就会塌 Japan suffers from earthquakes. 日本时常遭受地震之苦。
