a person in the know

Getting back into exercise can be a challenge in the best of times, but with gyms and in-person exercise classes off-limits to many people these days, it can be tricky to know where to start.

在境况最好的时候，重新开始锻炼身体也可能是一项挑战，但如今许多人都无法去健身房或参加面授的健身课程，就更是连从何处入手都很难知道。

Friendships are not made in a day, and the computer would be more acceptable as a friend if it imitated the gradual changes that occur when one person is getting to know another.

友谊不是一天就能建立起来的，如果电脑能模仿一个人逐渐了解另一个人时发生的变化，那么作为朋友它会更容易被接受。

Friendships are not made in a day, and the computer would be more acceptable as a friend if it simulated the gradual changes that occur when one person is getting to know another.

友谊不是一天建立起来的，如果电脑能模拟出一个人认识另一个人的过程中所发生的渐进变化，那么它将更容易被人们接受为朋友。