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Richard' s task in this kind of case is to identify what is precious ivory and what is just bone. One of the key features he looks for are these lines known as Schreger lines, unique to elephant ivory. The thing to remember here is that every turn, every facet you can actually see the Schreger lines. It' s spectacular, isn' t it? Yeah. So how does ivory compare to bone? The main differences is with bone you have these pits on the surface, they' re called Haversian pits. And the pits actually represent the channels that the blood vessels pass through within the bone. Now you won' t find on the surface of any ivory object these Haversian pits. So that' s a very good thing to look for. You can really see the pits there. Exactly. Okay. And you can' t see any Schreger lines. The man who' ll be crossexamining me is lawyer Mark Solon. With over 30 years experience in the courtroom, today he trains would be expert witnesses. |
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zài zhè jiàn àn zǐ lǐ, lǐ chá dé de rèn wù shì fēn biàn něi xiē shì zhēn guì de xiàng yá, něi xiē zhǐ shì pǔ tōng de gú tou. tā chá zhǎo de yí gè guān jiàn tè zhēng, jiù shì zhèi xiē xiàng yá suǒ tè yǒu de shǐ chuí gé xiàn. yào jì zhù měi gè guǎi jiǎo, měi gè miàn shàng dōu néng kàn dào shǐ chuí gé xiàn. zhēn shì shén qí duì gú tou hé xiàng yá yǒu shén me qū bié ne? èr zhě zhǔ yào qū bié, jiù shì gú tou biǎo miàn dí zhè zhǒng hā fú sī āo diǎn. zhèi xiē āo diǎn shí jì shang jiù shì gú tou lǐ de xuè guǎn, rèn hé xiàng yá de biǎo miàn, dōu bú huì yǒu hā fú sī āo diǎn. zhè shì biàn bié de yí gè hǎo bàn fǎ, zhè lǐ zhēn de néng kàn dào āo diǎn. méi cuò, ér qiě kàn bú dào rèn hé shǐ chuí gé xiàn, jiāng yào pán wèn wǒ de zhè gè rén shì mǎ kè suǒ lún lǜ shī. zhè wèi lǜ shī yǒu 30 duō nián fǎ tíng jīng yàn, jīn tiān, tā jiāng xùn liàn wǒ zhè wèi wěi zhuān jiā zuò zhèng. |