Just who belongs to the post-millennial generations is open to debate.

谁属于后千禧一代尚待商榷。

C) The worth of a college education is open to debate.

C) 大学教育的价值有待商榷。

Whether that would have made any difference is open to debate.

【debate】那样做是否会带来不同结果还有待商榷。

Nowhere was this escalation more dramatic than in Afghanistan, where as many as 130 civilians perished in strikes in 2017. Even so, their effectiveness is open to debate.

这种升级在阿富汗最为明显，2017年有多达130名平民在袭击中丧生。即便如此，它们的有效性仍有待商榷。

At first, the student was open to debate, doubting much of what the farmer said, thinking he was similar to the other ascetics the student had met in the past.

起初，学生对辩论持开放态度，对农夫说的很多话表示怀疑，认为他与学生过去遇到的其他苦行者差不多。