If we look deeper, it is hard to define happiness because it is most often described as a range of emotions ranging from contentment and satisfaction to bliss and intense joy.

• 如果我们看得深入一点，会发现快乐很难定义，因为它常常是被描述为一段范围之内的情绪，从满足和满意，到极乐与满溢的喜悦。