Translation of "As smooth as glass" in German

Only within the calm lee of the small island the surface of the lake is as smooth as a glass.
Nur im Lee der kleinen Insel ist es windstill und die Oberfläche des Sees spiegelglatt.
ParaCrawl v7.1

The island-style keyboard is firm and responsive, and although the jumbo matte trackpad isn’t as smooth as the MacBook’s glass panel, it’s not as jerky as the trackpads on so many run-of-the-mill Windows laptops.
Die Insel-Tastatur ist fest und reagieren, und obwohl die Jumbo-matte Trackpad ist nicht so glatt wie das MacBook Glasscheibe, es ist nicht so ruckartig wie die Trackpads auf so vielen run-of-the-mill Windows-Laptops.
ParaCrawl v7.1

The island-style keyboard is firm and responsive, and although the jumbo matte trackpad isn't as smooth as the MacBook's glass panel, it's not as jerky as the trackpads on so many run-of-the-mill Windows laptops.
Die Insel-Tastatur ist fest und reagieren, und obwohl die Jumbo-matte Trackpad ist nicht so glatt wie das MacBook Glasscheibe, es ist nicht so ruckartig wie die Trackpads auf so vielen run-of-the-mill Windows-Laptops.
ParaCrawl v7.1

And now the poor drummer was standing before the mountain, which was as high as if three mountains were piled on each other, and at the same time as smooth as a looking-glass, and did not know how to get up it.
Nun stand der arme Trommler vor dem Berg, der so hoch war, als wenn drei Berge aufeinandergesetzt wären, und dabei so glatt wie ein Spiegel, und wusste keinen Rat, um hinaufzukommen.
ParaCrawl v7.1

And now the poor drummer was standing before the mountain, which was as high as if three mountains were piled on each other, and at the same time as smooth as a looking-glass, and did not know how to get up it. He began to climb, but that was useless, for he always slipped back again. If one was a bird now, thought he, but what was the good of wishing, no wings grew for him.
Nun stand der arme Trommler vor dem Berg, der so hoch war, als wenn drei Berge aufeinandergesetzt wären, und dabei so glatt wie ein Spiegel, und wußte keinen Rat, um hinaufzukommen. Er fing an zu klettern, aber vergeblich, er rutschte immer wieder herab.
ParaCrawl v7.1