The code-named Natty Narwhal, Ubuntu 11.04 is slated for release in April 2011.

名为 Natty Narwhal，Ubuntu 11.04的代码预计于2011年4月发布。

The shaft of the ceremonial mace is the whorled tusk of a narwhal, a small Arctic whale. The door handles are of walrus tusk.

仪式权杖柄是用一种小型的北极独角鲸的牙齿制成的。门柄是用海象的牙齿制成的。

The narwhal measurements do correlate well with one-shot samples taken by winter helicopter surveys.

独角鲸测量确实与一次冬季直升机调查得到的样本相当一致。

The narwhal do not arrive until May, but by then the sea ice is long gone.

独角鲸的再次出现则要到第二年的五月，但到那时海面上的冰块早已不知了去向。

The code named Natty Narwhal, Ubuntu 11.04 is slated for release in April 2011.

这次开发的代码是Natty Narwhal，Ubuntu11.04预计于2011年4月发布。