工业废料更有害，因为其中有许多毒性很强的材料，如铜和铅。
Industrial waste is even more harmful since there are many highly poisonous materials in it, such as copper and lead.
的确，锡已经取代了在焊接时会产生大量有害物质的铅的王者之位。 由于锡毒性较弱，它已在许多焊接过程中取代了铅。
Tin has replaced lead, which is more toxic, in a lot of soldering.
儿童对于铅的神经毒性影响特别脆弱。
Children are particularly vulnerable to the neurotoxic effects of lead.
应用推荐