Increasing human number places intense pressure on ecosystems and natural resources, and this pressure is expected to increase until world population stabilizes at about 10 billion by 2050 to 2070. However, this stabilization will be achieved only if present efforts to check population growth are pursued vigorously.
【正确答案】：
但是， 只有现在继续强有力地控制人口增长，才能达到人口稳定。
【题目解析】：本题考查单句翻译——词义的选择。① stabilization（稳定）应增译为“人口稳定”； check 表示控制/抑制②被动句须译为无主句或主动句。（汉语主动句居多）但是，只有现在继续强有力地控制人口增长，才能达到人口稳定。