|
How A Key Open The Lock* y* V/ R2 W# q
开锁原理8 h& k' j$ a2 q
9 r3 I0 Z& T- _$ q# r! C; e) A. X, v( o
( R4 q2 R5 ^/ k) E; g0 `$ d/ S! r9 s( x. L1 ~( `
How Trumpet Functions* K% y7 _5 h0 \
小号如何工作) A3 m/ F4 y/ a
2 t8 O9 E$ m& e6 g& N- P' P' w0 a8 ?1 X/ z0 Y
/ {' A2 ~( \9 U& m
* R. f) s- B* o: f2 g* y8 ^3 `0 ]9 M' t+ _$ j; u
How Coins Are Filtered h* [# B4 G( G# ?7 q0 m; y( \' a
硬币是怎样过滤分类的
' R" _! d. V# X7 b6 L0 j9 ?$ s2 W) Z# J: F2 ~* D
9 \9 c4 e& D# a5 }* b3 c+ Y( }
. V0 R8 V( {8 \& @3 a/ i+ S7 lHow Sewing Machine Works# }; H4 S; @8 Z- Z5 l
缝纫机工作原理7 m0 P6 q% I4 E
& r/ n) @+ F7 E, G8 u( s
8 U) v! p ^9 ^1 ]2 w* r
6 p1 q# q5 t! t& ?* C4 UHow a Zipper Works
# z/ U; @& k8 t9 l% i C$ v拉链如何工作3 A0 W3 l2 x. I7 z8 a
; w1 g5 \- U; j+ C5 }" c/ g
4 R! B6 O( l, n4 H% W
+ \( [$ o& P \+ ?3 H- Z0 ~
: D# d# f0 e' @8 R! w( @9 D( G6 PHow Your Heart Functions, l4 S _# f- H9 G; {; O% r
心脏的工作原理
. E& H$ C- R1 k$ W* y2 R) w( T9 S; g2 L: a3 o2 o: Z
# s5 r' |& {! H" C; o- H, |! L
6 X% \1 l! B% v" K! BHow a Gun Works
, `) W6 q( e6 P枪的工作原理, t6 |$ y: u i/ }7 {, f: H
/ H+ s7 C- W2 e9 f
; R! u# T, _- x& v+ H5 \ # A" y2 v8 n% [8 s* o& s3 _& q. l
( M3 a3 v. N7 Y8 \# k" y5 o" |. w8 V
7 o( G m( |+ WHow a Grenade Works5 D4 d) _4 y1 [" @; l+ s6 _
手榴弹如何工作
% O; T! K9 e7 a9 S& i
1 Q* z+ Z r; k& g
( I3 e6 U m7 J9 o- v
4 ~5 j, X1 x2 q+ i# V8 A3 G! {How a Fan Works! L- Q0 B R/ {9 N/ @% Z9 s; l
电扇工作原理
2 L7 F# t7 P" ~, A1 I2 A
# `( Q8 V% k6 m- f, W2 C 8 l- J4 P1 i, j, l
2 ^! J s$ t2 d9 J' WHow are necklaces made5 R7 a' D8 B8 N% B a! t, f
项链是怎么做的
; B& O6 z R+ B( m) g5 M4 E1 b h: b' I3 p, z( X. \
( a6 }! M* K) W- R* y0 O' Z m; |. j# Z+ I5 q) S. k
Chain making machines
1 }6 q. F# X; D环状铁链制作) s% y- d( q5 a
8 @- k2 O( r4 F6 Z1 n1 ~( ^ 1 W% Z& S+ g9 m: m# ^7 n
" @+ ^. }) Y8 O& J" AFood processing machines* b4 B5 a/ |, z; _: A$ \* F0 [( c" _
食品加工机器, p5 H* {1 V k
1 u) z. C3 _ ^
2 A2 X9 [$ R0 I4 c% D/ y# O/ y7 E% m# z/ V& S. N' M
) m: B! j$ j$ f' d i* g1 Q圈圈蝴蝶饼干4 G% T4 _" O' ?- Q4 [. f' j
3 y! _0 `) j6 \9 ?" x7 @
- t2 ]1 l, j6 ~) I, Y/ p
9 g) K8 Z" d* B4 u( p
. L- t% f: ]1 _8 I9 @5 D; _奶油夹心饼干- d$ C- o, E6 _; P1 G
& H3 m) `' B3 K9 r6 Y( F
" y9 g7 [7 P1 S* ]3 R0 N" O8 N& w9 V( r# J+ j. ?7 q" B7 J
脆皮甜筒2 t" f" [, B+ A k. z' n
5 Z% ?# V0 w3 J
5 w( M$ d! a* r9 @( D 4 k( ^5 m/ O) b5 [7 g& v, n- a
2 e. @; l- w9 i& t
' Q, ]$ ]5 j! D" p4 {麦当劳派
( K- E% J" D9 b/ Z& {+ H( B
" i' r. I" Y+ ]( f2 O9 e; O . T) T2 R6 q2 A
0 i, t1 g$ o$ `5 q$ ?2 f z+ A% `4 C. }$ `9 s
Smart inventions
4 ]4 g9 ^1 N: N0 x2 B机智的发明
6 Y5 {3 y( m! w
8 t* \8 z: P9 X. ^3 q# v. ] # s" [$ a, j5 j% X, U8 d% X
9 u3 B; w. }. j3 w" Y |
|
这里因你而精彩
|
|
|
|
|