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高沟
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1.
Extra
care
must
be
taken
to
be
sure
that
water
does
not
cut through
any
of
the ridges
between
contour
furrows
.
要
格外
细心
以
确保
水流
不会
穿越
等
高沟
间
的
田埂
。
yào
gé wài
xì xīn
yǐ
què bǎo
shuǐ liú
bú huì
chuān yuè
děng
gāo gōu
jiān
de
tián gěng
。
blog.sina.com.cn
2.
Contour
furrows
overcome
this
problem
because
they are placed
on
a
gradient
of
about
0
.
5
% across
the
main
slope.
等
高沟
克服
了
这个
问题
,
因为
这些
沟
垂直
于
主
坡
方向
布置
,
沟
道
坡度
约
为
0
.
děng
gāo gōu
kè fú
le
zhè ge
wèn tí
,
yīn wèi
zhè xiē
gōu
chuí zhí
yú
zhǔ
pō
fāng xiàng
bù zhì
,
gōu
dào
pō dù
yuē
wéi
líng
.
blog.sina.com.cn