Line width–size relation of the Group A GMCs from the current survey (filled circles) and 55 "large clouds" from the first survey (red filled circles). The size of a cloud from the first survey was recalculated from the catalog (Mizuno et al. 2001b) by subtracting the NANTEN beam size. The thick dashed line indicates the best‐fitting power law of the GMCs from the second LMC survey. The relation found for the GMCs in the inner Galaxy from Solomon et al. (1987, thin dashed line) is shown as an example.