How can tartar and plaque be removed from teeth without grinding? is there any paste, etc. for it?
The girders of a suspension bridge form an arc. The definition of an arc is a curve or bowed shape, like a part of a circle. An example of an arc is a rainbow. To arc is defined as to make a curved shape or move in a curved path.
1 The frame, he insisted, was too tight. 2  The central section, for example, was undamaged.  A term such as namely or that is, used to introduce an example or a list, is usually set apart from that example or list by a comma. (The mark that precedes such an expression depends on the sentence structure.)