97免费视频观看_一区二区在线观看网站_久久av在线看_国产精品视频在线播放

so America and the EU have been trying to reach a deal which would eliminate the need to double-test many products.

美國和歐洲一直在尋求達成協議，以便為許多產品取消雙重檢查。

so every so often a sample is obtained with a coring bit.

因此時常要用取芯鉆頭取樣。

It is fairly clear that sleeping period must have some function,

很清楚，睡眠必然具有某種作用。

Apparently what happened was that water collected on these tar pits, and the bigger animals like the elephants ventured out on to the apparently firm surface to drink, and were promptly bogged in the tar.

瀝青坑里積存了水，大象那樣的大動物冒險到似乎堅固的水面上去飲水，立即掉進了瀝青坑。

There, a child grows up under the ever-present attention of his parents;

荒涼地區的孩子無時無刻不在父母關懷下成長。

gravity is the force that drives them in a continual attempt to restore the ocean surface to a flat plain.

地球引力是持續不斷企圖使海面復原為平面的力量。