The hardest arithmetic to master is that which enables us to count our blessings.
最难掌握的算术是能让我们计算自己的幸福。
-- Eric Hoffer 埃里克·霍弗
The hardest arithmetic to master is that which enables us to count our blessings.
最难掌握的算术是能让我们计算自己的幸福。
-- Eric Hoffer 埃里克·霍弗