6. essential adj. “绝对重要的”;“必不可少的”;“最基本的”“根本的”
n “必需品”通常用复数形式;“要素”;“要点”(15th line Para 3)
Good food and plenty of exercise is essential to a healthy life.
科学的饮食和充足的锻炼对于健康的生活是极为重要的。
If you are walking in the mountain, strong boots are essential.
如果你在山里行走,靴子是绝对必要的
It’s essential for you to set your goal . 你有必要把目标制定好。
It is essential that you (should) get there on time.你必须准时到那里
注意:essential后接that从句时用虚拟语气,从句中的谓语动词用原形。
Her most essential quality is kindness .
善良是她最基本的素质。
We can only afford to buy the essentials .
我们只能买得起必需品了。
It won’t take long to learn the essentials of the system.
学会该系统的要点费时不多。