Less dense substances move upwards to form a crust.

密度小的物质向上浮动并形成一层皮。

When these cells move upwards, they're filled with a hardened protein called keratin.

细胞在向上移动过程中，会被填充一种硬化的蛋白质，叫做角蛋白。

At certain point under the pile the stress come to the maximum and it will move upwards along the pile with the load increasing.

桩身应力最大点发生在桩顶下某点处，随着荷载的增加而向上移动。

As the drops fell glittering on to the earth, the inscription blocking their path vanished, and they found that they were able to move upwards once more.

亮晶晶的汗水落在地上，挡住他们道路的那一行字消失了，他们发现自己又能继续上山了。