他们认为林奈的系统已经沿用了那么久，改变将是一件很困难的事情。

They say Linneus' system has been used for so long that it would be very difficult to change.

youdao

他们认为林奈的系统已经沿用了那么久，改变将是一件很困难的事情。

They say Linneus' system has been used for so long that it would be very difficult to change.

youdao