Strong here means the amount of coffee (coffee powder) you want to have..more coffee more stronger!

"Strong" means a richer, deeper flavor. The "strength" of coffee can be adjusted by choice of coffee, the ratio of coffee-grounds to water, and the length of time that the coffee is brewed. 咖啡的“强度”可以通过咖啡的类型，咖啡渣与水的比例以及咖啡的酿造时间长度来调节。 I like very strong coffee. (Most people tell me that my coffee is "too strong"). I use Italian roasted coffee (usually "Starbucks Verona Blend"), I use double the amount of coffee, and I use a "Clever Coffee Dripper" to brew the coffee longer.

Strong here means the amount of coffee (coffee powder) you want to have..more coffee more stronger!