A measure or bar is a metrical unit, the space between two bar-lines.
小节是一个长音节，即两个小节线之间的部分。
2
In addition, viewing an element is initially presented as a single line, but you can expand the view to include multiple lines (as many as needed with a scroll bar) on a per-element basis.
Bar codes, familiar to us all as the black and white rectangular mark that enables products in a supermarket to be tracked, represent data using the spacing of parallel lines.