Definition: to be already happening Level: C2
建筑工程已经在进行中了。
The construction project is already ___be ___under ___way.
为找到解决方案，研究工作正在进行中。
Research studies ___are ___under ___way to find a solution.
和平谈判正在联合国总部进行中。
The peace negotiations ___are ___under ___way at the United Nations headquarters.
