While most of the May Fourth writers after Lu Xun tie feudalism to
cannibalism and devote themselves one way or another to the cause of national
salvation, Xu Dishan, as is evident in "The Merchant's Wife" [missing],
appears to be more more concerned with the salvation of the heroine's soul
than with the glaring inequities that reduce her to her present misery. (page
xxiii, The Columbia Anthology of Modern Chinese Literature, second edition)
In the hands of Qiao Dianyun [missing], humor is satirically black and
savage. (page xxvii, The Columbia Anthology of Modern Chinese Literature,
second edition)
请问这里的[missing]是什么意思?