pond scum造句怎么写

Hence ExxonMobil's $600 million research foray into car fuel made from pond scum, and Shell's decision to freeze all other investment in renewables to focus on biofuels.

It is this lurking sense of inferiority that makes us lust for success, consider ourselves pond scum, or both.

This is a sea dragon, and the one on the bottom, the blue one, is a juvenile that has not yet swallowed the acid, has not yet taken in the brown-green algae pond scum into its body to give it energy.