场景分类下地球科学篇第一篇地球interior
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i'm glad you (
brought)up the question of our investigation(
s) (into)(the)make up(makeup) (of) the earth(
's) interior
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since this is
a(the) topic
about(of) your reading ..
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let me
expend(spend) these last(f
ew)minutes of
the(不要）class
to(不要）talk(talking) about it.
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geolgist(geologist)
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the first
keeps the(key) discovery
have(had) to do with
side(seismic)waves
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remember they're the
viberation(vibrations)
calles(caused) byearthquake(by earthquake)
0 A! M/ d3 [# |0 B ?: V5 H/ @these(this)finding
s(不要）enbale(
d) ...
/ Y5 R! E) s2 Q" q# ]$ z9 Z5 xthe(these)study(studies) reveal(ed) that these
viberations(vibrations) were
(of)two types
9 H: q2 m6 J% {# p% |compression or pwaves and
shier(shear)or..
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well(while)p waves slow(
ed) down
in(at) a certain...
0 [' z7 T9 t$ E7 x7 c- ~so he concluded that depth marked the boundary between (
a) solid
metal(mantle) and
(a) liquid
quarr(core)' m' c1 c( J9 a, e& @
the evidence of
these(this is the molten lava that flows out of )volcanoes
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but we are(
still) not sure what the source of (
the)heat is
% C/ \ w0 ~/ y5 v这篇好难啊，听了五遍不止
