development既是可数名词又是不可数名词。如果是抽象的名词发展就不可数，如果是具体的发展就可数了。作名词时意为“发展；开发；发育；住宅小区（专指由同一开发商开发的）。
development：n.发展;发育;成长;壮大;开发;研制;研制成果;(新的)发展事态，进展情况，发展阶段。
扩展资料
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 childs 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。
