development可数吗?

　　This development could push the country into recession.

　　这个新情况可能使国家陷入萧条。

　　Stress is often a factor in the development of long-term sickness.

　　心理压力常常是形成长期病的.一个因素。

　　They are campaigning to save the area from building development.

　　他们正开展一场反对在这个地区进行房地产开发的运动。

　　Certainly, the early years are crucial to a child's development.

　　毫无疑问，幼年对儿童的成长至关重要。

　　The projected housing development will go ahead next year.

　　计划中的住宅建设将于明年动工。