Falcons are lucky to have so many people who keep an eye on them.
猎鹰很幸运，有这么多人在关注着它们。
On the down side, though, mirror life wouldn’t have any predators or diseases to limit its reproduction. They would have to keep an eye on that.
但镜像生命也存在缺点，那就是它的繁殖不受任何捕食者或疾病的限制，科学家们必须对其保持密切关注。
Since English universities started charging tuition fees to British undergraduates in 1998, they have kept an eye on whether their paying customers are satisfied.
自从1998年起，英国大学开始向本科生收取学费，他们也密切关注着这些消费者（指学生）是否满意。
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