所以，要生产优质、低氟、低铅的茯茶产品，应从适制茯茶的茶树品种选育工作开始。

Therefore, in order to produce high quality, low-fluorine, low lead Fuzhuan tea products, breeding should be put on the frist place.

youdao

今年，镍和铅的可用库存量均已降至非常低的水平，这意味着，如果供应出现任何可能的中断，都可能对价格造成放大效应。

Both nickel and lead have seen available stocks shrink to critically low levels this year and this means that any possible disruption to supplies has had an amplified effect on prices.

youdao

铅的比热要低，只有0。03，这很低很低了。

Lead is unusually low it's only.03. It's very, very low.

youdao