Thallium

['θælɪəm]

解释:

(noun.) a soft grey malleable metallic element that resembles tin but discolors on exposure to air; it is highly toxic and is used in rodent and insect poisons; occurs in zinc blende and some iron ores.

录入:李莉斯--From WordNet

解释:

(n.) A rare metallic element of the aluminium group found in some minerals, as certain pyrites, and also in the lead-chamber deposit in the manufacture of sulphuric acid. It is isolated as a heavy, soft, bluish white metal, easily oxidized in moist air, but preserved by keeping under water. Symbol Tl. Atomic weight 203.7.

德布斯录入

解释:

n. a metal closely resembling lead in colour and softness but slightly heavier first discovered in 1861 and so called from the presence of an intense green line in the spectrum of the flame in which it is volatilised.—adjs. Thall′ic Thall′ious.

黛拉校对