病人经历了一场持续数月的长期疾病。

The patient experienced a ___prolonged illness that lasted for several months.

避免长时间暴露在阳光下以防止皮肤损伤。

Avoid ___prolonged exposure to the sun to prevent skin damage.

令我们惊讶的是，我们在从希思罗机场出发时不得不忍受的长时间延误。

What surprised us was the ___prolonged delay we had to suffer during our departure from Heathrow.