Liferay's grid is based on bootstrap, which provides a virtual grid of 12 possible columns - this way you'll have the option to have fractions like 1/1, 1/2, 1/3, 1/4, 1/6, and 1/12 as the width for a row. 1/5 is not among the options, so you'll have to change at least one row's width (and the grid is flexible, so that you can also change the width of two of two rows)
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…