The poor boy had difficulty walking为什么前面是has而后面用walking

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The poor boy had difficulty walking为什么前面是has而后面用walking
x) HU(/RHʯTHLQHLKL.)T(OKcד Ovv<}9wѳ3_4<>&HP߅/|c<|kWغOu<}`v>ٽɮT y )y %6yv w'

The poor boy had difficulty walking为什么前面是has而后面用walking
The poor boy had difficulty walking为什么前面是has而后面用walking

The poor boy had difficulty walking为什么前面是has而后面用walking
这个可怜的男孩走路很困难
等价于be difficult in dong sth