viola
n
stringed musical instrument played with a bow, of larger size than a violin 中提琴. =>illus at App 1 见附录1插图, page xi.
viola n any of various types of plant, including pansies and violets 堇菜目(包括三色堇和紫罗兰).
It took him some time to connect the long rubber pipe to the air supply pipe that ran round the port, but at last it was done and as a result work was able to progress much faster.