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plough through
plough under
plough up
plough wind
plough-body spacing
plough-in boundary edge
plough-in critical speed
plough-share
ploughback
ploughboy
ploughed and tongued joint
ploughed bean
ploughed-and-tongued joint
ploughhead
ploughing
ploughland
ploughman
ploughman's lunch
ploughshare
ploughshoe
ploughstaff
ploughtail
ploughwright
Plovdiv
plover
plow
plow back
plow back benefit
plow beam
plow bit
plough under
plough up
plough wind
plough-body spacing
plough-in boundary edge
plough-in critical speed
plough-share
ploughback
ploughboy
ploughed and tongued joint
ploughed bean
ploughed-and-tongued joint
ploughhead
ploughing
ploughland
ploughman
ploughman's lunch
ploughshare
ploughshoe
ploughstaff
ploughtail
ploughwright
Plovdiv
plover
plow
plow back
plow back benefit
plow beam
plow bit
plough through
费劲地阅读, 吃力地钻研
艰难地通过
艰难地通过