Regularity ought to be observed, as regularity is very conducive to health. 生活應遵守規律，因為規律對健康有益。
But in land-travel, wherein so much is to be observed, for the most part they omit it; as if chances were fitter to be registered, than observation. 但當其漫遊於大陸，有諸多景象可觀之時，他們卻往往疏於著墨，彷彿偶然之所見比刻意之觀察更適於記載似的。
A low-power, wide-angle telescope fixed to the body of a more powerful telescope and pointed in the same direction for initially locating an object to be observed. 尋星鏡一種低功率大視野的望遠鏡，附加在一台較大的望遠鏡上，為開始標出被觀察的物體位置而指向同一方向
Troop movements can be observed from space by a satellite. 藉助衛星可觀察到部隊的調動。
