[00:00.00] 1.Water is essential to the growth of crops.

[00:07.82]水是庄稼生长所必需的。

[00:15.65]2.Railways are essential to the economic prosperity of the region.

[00:24.70]铁路对本地区经济繁荣很必要。

[00:33.75]3.A tape recorder is essential to a student of English.

[00:41.89]对学英语的学生来讲，录音机是必要的。

[00:50.02]4.Exercise,fresh air and sleep are all essential for health.

[00:59.32]锻炼、新鲜空气和睡眠都是健康所必不可少的。

[01:08.62]5.The essential purpose of a vacations is to relax.

[01:16.15]假期的根本目的是放松。

[01:23.67]6.Respect is essential in friendship.

[01:30.95]相互尊重对保持友谊很重要。

[01:38.22]7.This is the essential difference between you and me.

[01:45.93]这就是我们之间的本质差别。

[01:53.63]8.Industrial growth is essential to the national economy.

[02:01.46]工业发展对于国民经济是必不可少的。