Definition
something unpleasant or difficult that one has to accept and cannot be changed.
難免的事實
Even if you're careful, catching a cold sometimes is a fact of life.
即使你很小心，有時感冒也是無法避免的事實。
Traffic jams are a fact of life in many large cities.
交通堵塞是許多大城市中無法避免的事實。
The decline of physical abilities is a fact of life as one gets older.
隨著年齡增長，身體機能下降是無法避免的事實。