и俼еķc(din)Ҫ˶Ҫ֪Լķ揊(qing)ķᘌ(du)Եľ(x)Ǯ(dng)и俼|Ҫr(sh)D(zhun)Q·(xin)
e(cu)`1W(xu)(x)иDZи~
иx~R8000ңܶĸֻ2000(yu)һЩČW(xu)ܕ(hu)4000ңҪߵ8000ҪU(ku)~RW(xu)кܶ~(sh)^(gu)˺ܶڌ(sh)Hx (tng) (tng)}^(gu)߀@Æα@?yn)鿼ӛֻdž~ĘӶϤİl(f)÷
䌍(sh)и (tng)f(shu)x(xi)@Ă(g)֣~RDzͬ~Rx֣Ȼ@һֻҪ켴mȻ (tng)ֿ~RҪ(du)һЩ(du)Ҫ һҪ죬 Z(y)һҪ(xi)Ҫ졣һ Ҫ(du)(j)@ЩA(ch)ĵ~ROϤ
Æ~(sh)ϵy(tng)ȥ~ (yng)ԓY(ji) (tng)^(gu)ÿһƪ (tng)x^(gu)ÿһƪxе~@ڌ(sh)H\(yn)յĆ~(hu)ο?yn)㲻H֪˼ ߀ Լ÷
Ҫ~(sh)и½Y(ji)(li)Óx~ ֻ¶ȥY(ji)
e(cu)`2ֱӽ|и}
(du)ڻA(ch)ǺܺõͬW(xu) hֱӽ|и 俼r(sh)g^L(zhng)hͨ^(gu)mԼyȵĽ̲ā(li)ѭuM(jn)ԼӢZ(y)ľCό(sh)@摪(yng)õIJ ώԃ(xn) (tng)棬ͨ(hu)hͬW(xu) (tng)step by stepsixty-second scienceȵȡ
(du)(li)f(shu)ӢZ(y)W(xu)(x)^խһ㲻ܿĽ̲ġ@Ҫ҂ǴW(xu)Ҫȥ (tng)BBCһЩýw@漰һЩ(zhun)I(y)~R(du)(li)f(shu)Ї(gu)W(xu)|ú҂Ҫͨ^(gu) (tng)һЩ
e(cu)`3˽ֵĿ췽ƴ(sh)
ÿһֶиҪ (tng)֮֮L(fng)ˮ猑(xi)ܶͬW(xu)AÏ(f)sĆ~Ï(f)sĆ~Ѓɴc(din)һOƴ(xi)e(cu)`õòǡ(dng)еĆ~ֵgò(zhn)_һʹֻ(hu)ЦԷԆ~đ(yng)ҪԵwmÞdžμ(f)s~Rٱ (tng)ܶͬW(xu)(hu)äĿӛһЩ¼(x)(ji)ˌ(du)wܘ(gu)ҪϢİȱ(du)(ni)M(jn)Кw{Y(ji)ղסµc(din)}DzҪI(lng)䌍(sh) (tng)ֲҪм(x)(ji)ȥ (tng)ֻֻҪ (tng)ԓ (tng)ă(ni)@һփ(ni)ݴ}ѽ(jng)ˡ@һփ(ni)ͨ(hu)@Ę(bio)־~(li)(do)
e(cu)`4](mi)Еr(sh)g^
и(li)vܶW(xu)R(chng)ĕr(sh)ãȻ֪ƽr(sh)ú٣ڼĕr(sh)ҪһЩи}f(shu)Z(y)Z(y)o15犵ĕr(sh)g(zhn)35犕r(sh)gȥvW(xu)ƽr(sh)](mi)гֵĻr(sh)gȥ(x)Ԓ(hu)ȥ(zhn)15^βvһЩ߉ԵԒ(hu)ܶW(xu)֪ôȥvhƽr(sh)Ԍ(du)RԼ(zhn)1535֮(ni)ô@Ԓ(hu)f(shu)ǺҪ
e(cu)`5](mi)ϙC(j)^(gu)ģM
иϙC(j)ԇѽ(jng)(x)T˕(sh)}ͬW(xu)һҪǰm(yng)һC(j)ĸX(ju) (tng) (tng)Ӻ}҂(jng)vӢZ(y)ԇ (tng)Կ@(g)(wn)}ȥ (tng)@N“ã (tng)“ĸX(ju)҂Ҫȥm(yng)
Ͼи俼5(g)e(cu)`һҪ@ͬW(xu)(x)ͿԇҪ`աҪV뿿Rr(sh)_ø߷yȺܴġW(xu)(x)ǂ(g)շe۵DZһؼܳɹġґ(yng)ԓƽ͵đB(ti)ȥ(du)иԇÿ(g)˶(hu)кܺõİl(f)]