Rough seas today prevented specially equipped ships from skimming oil off the water's surface.今天汹涌的海浪使特别装备的船只无法撇去浮在水面上的石油。
Skim the jam and let it cool.撇去果酱上的浮沫,让它冷却。
Skim the scum off the jam and let it cool.撇去果酱上的浮沫,让它冷却。