1. The monotonous sound of the alarm clock had a deadening effect on my energy in the mornings.
闹钟发出单调的声音每天早上让我感到十分沉闷。

2. The constant rain had a deadening effect on their spirits, making them feel gloomy and unmotivated.
持续的雨天让他们的情绪变得低落，让他们感到阴郁和缺乏动力。