“我们仍不明白引起这些差异的原因，但我们计划下年来研究这个问题，”他说。

"We don't yet know why these differences occurred, but plan to studyit in the next year, " he said.

youdao

“我们仍不明白引起这些差异的原因，但我们计划下年来研究这个问题，”他说。

"We don't yet know why these differences occurred, but plan to studyit in the next year, " he said.

youdao