Watch out for mud and other slippery surfaces like rocks.

小心泥土和其他光滑的表面，比如岩石。

The cobbled streets in Paris, obviously slippery surfaces.

巴黎的鹅卵石街道，明显湿滑。

Prey lands on the plant's slippery surface and  slides down into a pool of digestive juice.

猎物落在植物光滑的表面上，然后滑落到消化液池中。

Prey lands on the plant’s slippery surface and slides down into a pool of digestive juice.

猎物落在植物光滑的表面上，然后 滑入消化液池中。

Besides ketchup, their slippery surfaces also aid the dispensing of products such as mayonnaise, and may help, too, with things like hummus and soured cream that have a thicker consistency and which usually come in tubs.

除了番茄酱，他们的光滑表面还能帮人们更畅快地涂抹蛋黄酱等产品。还有鹰嘴豆泥和酸奶油之类更粘稠和通常用盒子装的产品或许也用得着。