magnitude of a complex number

例句：

1. 1. The magnitude of the problem is enormous.
   这个问题的规模是巨大的。
2. 2. The magnitude of the earthquake was felt throughout the city.
   地震的强度在整个城市都能感受到。
3. 3. The magnitude of the storm was so strong that it caused widespread damage.
   风暴的强度如此之大，以至于造成了广泛的破坏。