focus on集中于什么, 不仅限于看了,
再学术点,把以上的动词全部变形为 名词, 比如 base on the observation of ... , someone conclude that...
还有from the perspective of ..., someone .....从什么角度(看),
monitoring 监视,主语未必是人,可以是机器,monitoring ..., the satellite...
1,In fact he only had a glimpse of her but he had never forgot her since then.
2, He observes carefully but says little.
3,Don't stare at people, it's impolite.
4, He stood still with an angry glare.
look指一种状态
see 一般是指看到
watch看电视啊,什么的
visit意为观赏。用于景点
look through详尽核查;浏览;温习;仔细查看
look to指望;留心;照管;照顾
look like看上去象;显得;看起来象;看似
clap eyes on 看见;注视 keep an eye on 照看;留意 ...