答案：BDCBA

詞匯講解

1. comparatively 比較地,相當地,多少

All this was comparatively slow until, with the coming of science, the tempo was suddenly raised.
所有這些發展都比較緩慢，直到出現了科學，其速度才突然加快。

The Norwegians live in a comparatively cold zone.
挪威人生活在比較寒冷的地區。

2. insuperable 不能制勝的, 不能克服的

The difficulties that confront us seem insuperable.
我們面臨的困難似乎是不可克服的。

Your 15th difficulty not insuperable expect your utmost endeavor advise result
15日電悉，困難并非不可克服，望盡最大努力并電告結果。

3. sterilize 使成不毛,斷種,殺菌

After her fourth child she decided to be/have herself sterilized.
她生了第四個孩子後決定做絕育手術.

The doctor performs operations with sterilized surgical instruments.
醫生用消過毒的外科手術器械做手術。

4. deterioration 惡化,降低,退化

Inevitable and steady deterioration of a system or society.
惡化，敗壞系統或社會不可避免的無法逆轉的惡化或敗壞