erosion
noun
ɪˈrəʊʒən
noun
1
the
process
by
which
rock
or
soil
is
gradually
destroyed
by
wind,
rain,
or
the
sea
〔风、雨、海水等的〕侵蚀，腐蚀
the
problem
of
soil
erosion
水土流失的问题
the
erosion
of
the
coastli
ne
海岸线（遭受的）侵蚀
2
the
process
by
which
something
is
gradually
reduced
or
destroyed
逐步损害 （削弱 ）
[+
of
]
the
gradual
erosion
of
our
civil
liberties
我们公民自由的逐渐削弱