Spiral

(noun.) flying downward in a helical path with a large radius.

(noun.) ornament consisting of a curve on a plane that winds around a center with an increasing distance from the center.

(noun.) a continuously accelerating change in the economy.

(noun.) a plane curve traced by a point circling about the center but at increasing distances from the center.

(verb.) form a spiral; 'The path spirals up the mountain'.

弗朗西丝编辑

• Obviously, as the cylinder was turned, the needle followed a spiral path whose pitch depended upon that of the feed screw. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
• The rifle grooves, however, were first made spiral or screwed by Koster, of Birmingham, about 1620, while straight grooves are said to have been in use as far back as 1498. Edward W. Byrn. 十九世纪发明进展.
• They are put together with a double-lapped spiral seam to give expansion-resisting qualities, and as an additional precaution small metal rings are slipped on the outside. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
• It circled (owing to the guys of one wing being loose) to the right, completing two circles and beginning a third as it advanced; so that the whole course had the form of a spiral. 李贝. 西洋科学史.
• The feature of importance in the cannon which contributed most to its efficiency was the rifling of the bore with spiral grooves. Edward W. Byrn. 十九世纪发明进展.
• Other forms of pegs followed, such as the metal screw pegs, and machines to cut them off from a continuous spiral wire from which they were made. 威廉·亨利·杜利特. 世纪发明.
• The simplest form and most effective sweeper comprises a large cylinder armed with spiral rows of splints and hung diagonally on the under side and across a frame having two or four wheels. 威廉·亨利·杜利特. 世纪发明.
• A cold grey sky threatened rain, and a high wind drove the dust in wild spirals up and down the streets. 伊迪丝·华顿. 快乐之家.
• The trouble with these attachments was that they were either stripped off, or stripped away, by the gun spirals. 威廉·亨利·杜利特. 世纪发明.

录入:雷蒙