
搜索
沿袭, 传承
降低, 减小
预付款, 首付
关闭, 停机
直到, 一直到
往下, 下去
降价, 下调
缩减, 精简
否决, 驳回
写下, 记录下来
瘫痪的, 无法使用的
下跌的, 降低的
出局, 被淘汰
关闭的, 降低的
支持的, 参与的
击倒, 摧倒
What is "down"?
Down refers to a type of feather found in birds that is characterized by its smooth and fluffy texture. It is made up of soft, fine filaments that lack the interlocking barbs found in other feathers, giving it a delicate and airy appearance. The down feathers are typically located beneath the outer feathers, close to the bird's body, and serve several important functions. They provide excellent insulation, trapping air and creating a layer of warmth next to the bird's skin, which helps regulate body temperature in both cold and hot environments. The fluffy structure of down feathers also allows for efficient buoyancy, aiding birds in floating on water surfaces. Down is highly valued for its insulating properties and is often used in the manufacturing of bedding, clothing, and insulation materials.
绒毛, 柔毛
次, 轮
What is a "down"?
A down in football is one of the four chances the offensive team has to move the ball at least ten yards. Each time the ball is snapped, the team is given a down to try and advance the ball. If the team gains ten or more yards, they are awarded a new set of four downs. If they do not, they either lose possession of the ball or attempt a kick, such as a punt or field goal.