1．essential adj.完全必要的；极其重要的
①(2022·北京高考)The result—an approach known as systems thinking—is now seen as essential in meeting global challenges.
其结果——一种被称为系统思维的方法——现在被视为应对全球挑战的关键所在。
②(牛津高阶)Breathable, waterproof clothing is essential for most outdoor sports.
大多数户外运动衣服必须透气且防水。
③(牛津高阶)It is essential to keep the two groups separate.
必须将这两个组分开。
④(牛津高阶)It is essential that you attend all the meetings.
你务必要参加所有的会议。
⑤(剑桥高阶)The essence of his argument was that education should continue throughout life.
他的论点的实质是教育应该贯穿一生。
