Those anecdotes are often dismissed as aberrant behaviors—opportunistic protein snacks added to a diet made mostly of salad.
这些报道经常被视为异常行为—人们只是觉得这是河马在自己的素食沙拉中偶尔增加些蛋白质而已。
英语百科
Deviance (sociology)
In sociology, deviance describes an action or behavior that violates social norms, including a formally enacted rule (e.g., crime), as well as informal violations of social norms (e.g., rejecting folkways and mores). It is the purview of criminologists, psychiatrists, psychologists and sociologists to study how these norms are created, how they change over time and how they are enforced.