Put the required amount of metal into the crucible.

把适量的金属放入熔炉内。

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Late appear a small amount of metal weighing currency, COINS, currency and formation.

后期出现少量金属称量货币、铸币，属货币萌芽与形成时期。

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And inside the material is a small amount of metal that has titanium incorporated in it.

和内部材料是一种少量的金属钛已在它成立。

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So, if we want to go from that stable state to that less stable state, we need to put in a certain amount of energy to our system, that difference between the free electron and the electron bound to the metal.

所以，如果我们想使电子,从稳态到达不够稳定的状态，我们需要引入一定数量的,能量到系统中，即自由电子和束缚于金属的,电子的能量差。

麻省理工公开课 - 化学原理课程节选

This problem explains why metal money has circulated not in lumps but as coins, with a regulated amount of metal in each coin.

ECONOMIST: Free exchange

In his study, Rickard found that the amount of metal in the sludge depended on the concentration in the clothing - and this varied hugely.

BBC: Smelly socks raise silver stink

Objects which hitherto had to be cast in solid metal can be manufactured as hollow shapes, reducing their weight and the amount of precious metal used.

BBC: How tech is transforming jewellery