Since most camera flashes emit IR along with their burst of visible light, the one substitution allowed the prototype to transmit and record infrared light.
由于大多数相机闪光灯在发出可见光同时就会发射出红外线，这一替换使得原型机能够发送并记录红外线。
2
The Rails gem is quite a thin and simple component that orchestrates behind the scenes the seamless integration of all other components; two of the most visible being Active Record and Action View.
Wholesale record prices are highly visible—a few prices in company catalogues account for the bulk of sales—which suggests that firms could plausibly co-ordinate on an agreed tariff.