riptide

• 指海中一股强劲、湍急的水流，常由两股相遇的水流或从岸边向外海退去的水流造成，能把人带离海岸。也可泛指任何猛烈的水流或急流。

A noun referring to a strong, turbulent current of water, often caused by opposing currents or flowing outward from a shore.

1. Turbulent water from colliding currentsB2formal

   A stretch of rough or agitated water in a river or sea, caused by one current flowing into or across another current.

   激流

   • The riptide near the river mouth made navigation dangerous.
   • Sailors avoid the area where the riptide is strongest.
   • The collision of the two currents created a powerful riptide.

   同义词raceriptide rip

2. Strong outward shore currentB2formal

   A strong surface current that flows outward from a shore, often dangerous for swimmers.

   离岸流

   • The lifeguard warned swimmers about the dangerous riptide.
   • He was caught in a riptide and pulled away from the beach.
   • Always swim parallel to the shore if you get caught in a riptide.

   同义词riprip current