1.Medieval alchemists attempted to transmute base metals into gold.

1.中世纪炼丹术士企图把炼成。

2.The natives used to hammer the metal into arrowheads, using heavy stones.

2.土著人以前总是用沉重石头把这种锤打成箭头。

3.Its properties also provide rust protection for steel surfaces and other oxidizable metals.

3.其性质也针对铁及其他易氧化表面提供防锈保护。

4.It also serves and a rust protection coating on steel and other oxidizable metals.

4.也可用于钢铁和其他易氧化表面作为防锈料。

5.All renascent oxygen is consumed for oxidizing metal anode to form metal oxide film.

5.当形成足够厚氧化膜后， 阳极氧化速度减慢， 阳极表面才析出氧气。

6.What spurred them on was alchemy,the “science” of changing ordinary metals into gold.

6.激励他们是炼术，即把普通变为子“科学”。

7.Copper is a highly conductive metal.

7.铜是极易导（电、热）。

8.Gold and silver are tractable metals.

8.和银是容易加。

9.The blacksmith is hammering the red-hot metal.

9.铁匠正在锤烧红铁。

10.Certain metals are attracted to a magnet.

10.某些受磁石吸引。

11.This workshop melts down the metal scrap.

11.这个车间熔化废。

12.He hands a metal disc to me.

12.他把一个圆盘给我。

13.The acid has eaten through the metal.

13.酸把这块腐蚀穿了。

14.This metal net filters out the dirt.

14.这个网滤掉污物。

15.Sugar, oil and metals are refined before use.

15.糖, 油和在使用前须先提炼。

16.Molten metal ran out on to the flagstones.

16.熔化溢流到外面石板上。

17.A worker put metal bands around the safe.

17.一名人用箍箍那保险箱。

18.Will unscrewed the cap from a metal flask.

18.威尔旋开瓶盖子。

19.He hammered out the dents in the metal sheet.

19.他把板上一些凹痕敲掉了。

20.Most gateways had a metal grill called a portcullis.

20.大多数通道上都装有叫作吊闸铁格栅。