The essential difference between Sam and me was the fact that I took life seriously.
我和萨姆的根本区别在于我是认真对待生活的。
The essential point of relay racing is that it is a team effort.
接力赛跑的基本要点是讲究团队配合。
adj. 基本的；必要的；本质的；精华的
elementary、
fundamental、
basic、
necessary、
primary
n. 本质；要素；要点；必需品
element、
principle、
entity、
necessity、
requirement、
texture
adv. essentially
n. essence、 essentiality