听写训练2
% O$ f- N \% b( t$ n+ hthis copy(coffee)can contains soil of(from) my garden
[1 V0 F; U. ]$ y# I# v, t- R9 ]1 {and i have prepared slicen supposed to show you it's alive(And I prepared slide samples to show you that it is alive.)$ A! P6 F5 A% o, K# p
This ordinary backyard dirt is crolied (crawling) with microscopes(microbes)( ]9 ~6 L3 u2 Z% Y8 m
microbizes(microbes)( R+ {, i; a* Q# A" Y+ ^' `5 W
but (what) they have in common (is that)..with(a)naked eyes(eye)
+ Q* m" r' `3 p8 @* B- @/ b/ H, qthey're microscopy(microscopic)% o' e5 q! R- c% K; g/ e4 \% H5 }
look at this slit(slide)2 h' f, Z, q' u% W7 n
Those are yeasts
$ W7 Y+ x6 w7 E: q, gfermenters$ o1 N& n4 j" Z9 j( z$ N
bread,beer,you've eaten(yogurt) and so forth.& O- k; L' }2 W8 z5 h2 D* B
look for an irregular shape with hairs coming up(out of it. ). y9 w+ L7 {4 q" m2 Q# W
that's a mode(mold); M& v6 B7 {' L" F) M1 I$ Z
protozoa
4 U! A) ~. l2 p' \$ KSome protozoa, like the one causes malaria are harmful to people.
: R* C7 d! l! ^' jA microbic that causes disease is called a pathogen. , o3 \$ ?2 n1 h( f3 G2 E
Finally you should see a lot of squiggly lines
2 P: F9 S! B* x, J! ~3 `7 h8 C, CThe oldest form( of) life on earth6 A1 }* C. H# V6 w% w- _; P, i6 {
But they are even (simpler structurally) because their cells do not have nuclear.
: r5 t# d9 i9 ISo I've got about a teaspoon of soil in my hand here
+ ] H* E- S# b/ p* @In that teaspoon are about ten thousand protozoa, 200 thousand mold cells, a million yeasts, and probably a billion bacteria
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[ 本帖最后由 功夫熊猫2 于 2008-12-2 14:39 编辑 ]