At present, the sorting of the field is being carried out in the building.
目前，该分拣场的建设正在紧张进行中。
The study is being carried out in public school systems in seven American cities.
这项研究正在美国七个城市中的公立学校系统中执行。
The study is being carried out in public school systems in seven American cities.
这项研究正在美国七个城市中的公立学校系统中执行。
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