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anterior end
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The
nucleus
fastigii was
situated
to
the middle
line
at
the
anterior
end
of
the
superior
vermis
,
and
over the
roof
of the fourth
ventricle
.
顶核最靠内侧，紧邻第四脑室顶的外侧和上蚓前部的内侧面，在中线两侧对称分布；
A
caplike
structure
AT the
anterior
end
of
a
spermATozoon
thAT
produces
enzymes
aiding
in
egg
penetrATion
.
精子头粒蛋白一种在精子内前端的帽状结构，可产生帮助穿透卵子的酶
In
vertebrates
the
anterior
end
of
the
nerve cord
expand
to
form
a
brain
.
脊椎动物神经的前面扩大形成脑。
The
pump
body
consists
of
pump
housing
,
anterior
end
cover
,
rear
end
cover
, anterior
impeller
,
rear
impeller,
and
permanent magnet
as
rotor
.
泵体包括泵壳、前端盖、后端盖、前导叶、后导叶和转子，转子为永磁体；
The
mouth
cavity
at
the
anterior
end
of
the
alimentary
canal
.
位于消化道前端开口的空腔。
There
is a
special
marked
fold
on
the
anterior
end
that relates to the
development
of
digestive system
,
hereditary
,
and
other
factors
.
有特殊折叠，折起的形成可能与消化系统发达、遗传发育等因素有关。