Definition
something unpleasant or difficult that one has to accept and cannot be changed.
难免的事实
Even if you're careful, catching a cold sometimes is a fact of life.
即使你很小心，有时感冒也是无法避免的事实。
Traffic jams are a fact of life in many large cities.
交通堵塞是许多大城市中无法避免的事实。
The decline of physical abilities is a fact of life as one gets older.
随着年龄增长，身体机能下降是无法避免的事实。