污染＝na.1.
pollute;
contaminate
Soot
fouls
the
air.
烟屑污染空气。
例子：1.
To
avoid
contamination,
do
not
touch
the
tip
of
the
container
to
any
surface.
Replace
the
cap
after
using.为避免污染,不要用瓶子顶部接触任何表面,用后将瓶盖盖好。
2.No
one
can
deny
that
the
fact
that
the
polution
had
become
a
huge
menace
to
human
survival.没有人能否认,污染对人类的生存构成了巨大的威胁。
有用请采纳
