精品无码久久久久久国产_成人午夜在线视频一区_亚洲最大的av网站_亚洲欧美综合区自拍另类_91精品国产一区_日韩精品中文在线观看_一道本无吗dⅴd在线播放一区_国产精品旅馆在线_欧美午夜久久久_亚洲自拍在线观看_黑人精品xxx一区一二区_亚洲精品日韩久久久_在线视频一区二区_国产欧美久久一区二区_中文字幕精品在线视频_成人欧美在线观看

I'm not a light, I'm a darkness.

The pursuit of knowledge is a journey that never ends, and every discovery opens the door to new questions.

一項發(fā)明可能價值連城，但對發(fā)明者卻毫無價值。

The Eskimos had fifty-two names for snow because it was important to them: there ought to be as many for love.

The voice is the first instrument.

農(nóng)業(yè)的未來在于尊重土地和勞動者的可持續(xù)實踐。