For logistical and political reasons, scientists have only recently been able to gain access to the area.
因后勤与政治原因,科学家们直到最近才得以进入该地区。
These volumes became the vade mecum for modern British historians and political scientists.
这些合订本成了现代英国历史学家和政治学家的手册。
Most progress has been led by people who were bold-scientists, political servants, artists, and others who didn't wait for opportunities; they created opportunities.
凡是那些引领社会进步的人,大都是大胆的人——科学家,政客,艺术家,还有那些不甘于静候机遇的人——他们会主动地创造机遇。
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