英语高手帮忙翻译一下文章！！
世界上有很多不同种类的鸟,它们中的很多都很漂亮,小巧,可爱
世界上最小的鸟是humming鸟, 它们来自南美洲,它们有色彩斑斓的羽毛,长长的嘴.它们是吃花蜜和小昆虫.鸟是我们的朋友.它们能帮助我们做很多事.它们中的一些羽毛可以作成衣服,它们可以抓害虫.它们中的一些生活在千年前.这些鸟能帮助我们了解一千年;以前的地球.它们中的一些还能唱美妙的歌.我们必须保护鸟类.
新转向操纵箱零件钻、绞、攻丝钻床专用夹具设计
Changes
the
control
box
components
to
drill,
to
twist,
attacks
the
silk
drilling
machine
unit
clamp
newly
to
design
摘要
Abstract
本设计为拖拉机转向操纵箱零件钻基准孔工序的机床专用夹具设计并进行了夹具的三维造型。本道工序需要完成工件上的2-Φ14基准孔、1-Φ10孔以及工件侧面Z3/8”油孔的加工，设计中采用翻转钻模，通过夹具体上的分度装置依次到达安装工位，钻三孔工位，钻、攻Z3/8”油孔工位，完成工件的工艺内容。该设计理论依据充分，结构合理，能满足本工序的各项精度要求。
This
design
changed
the
control
box
components
for
the
tractor
to
drill
the
datum
hole
working
procedure
the
engine
bed
unit
clamp
to
design
and
to
carry
on
jig's
three
dimensional
modelling.
This
working
procedure
needs
to
complete
on
the
work
piece
2-
φ14
datum
hole,
1-
φ10
holes
as
well
as
work
piece
side
Z3/8”
the
oil
hole
processing,
in
the
design
uses
the
turn
over
jig,
arrives
in
turn
through
the
jig
body's
on
spacing
device
installs
the
location,
drills
three
locations,
drills,
attacks
Z3/8”
the
oil
hole
location,
completes
the
work
piece
the
craft
content.
This
design
theory
basis
is
full,
the
structure
is
reasonable,
can
satisfy
this
working
procedure
each
accuracy
requirement.
由于拖拉机转箱操纵箱零件的加工批量很大，设计中参考了许多成熟的结构，本设计结构简单、操作方便，使用了大量的标准元件，大大缩短了本工序的辅助时间，一定程度上提高了劳动生产率，减轻了工人的劳动强度。同时具设计中也存在一些缺点，譬如，夹具体重量较大，不便于整体的运送；而且夹具装配后占用较大的面积，有待于进一步的改善。
Because
hauls
the
turning
point
box
control
box
components
the
processing
batch
to
be
very
big,
in
the
design
has
referred
to
many
mature
structures,
this
design
structure
is
simple,
the
ease
of
operation,
has
used
the
massive
standard
components,
reduced
this
working
procedure
non-cutting
time
greatly,
in
the
certain
extent
raised
the
labor
productivity,
reduced
worker's
labor
intensity.
Simultaneously
has
in
the
design
also
to
have
some
shortcomings,
for
example,
the
jig
body
weight
quantity
is
big,
is
not
advantageous
for
the
whole
shipping;
Moreover
after
jig
assembly,
takes
the
big
area,
waits
for
in
the
further
improvement.
本次设计利用Auto-CAD
、SolidWorks
2007等先进的辅助设计软件进行设计，结构明确，可视化效果很好。
This
design
using
Auto-CAD,
SolidWorks
2007
and
so
on
advanced
aided
design
software
carries
on
the
design,
the
structure
is
clear,
the
visualization
effect
is
very
good.
关键词：
Key
word:
专用夹具
Unit
clamp
定位
Localization
夹紧
Clamp
钻套
Drills
the
wrap
钻模
Jig
自由度
Degree-of-freedom
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