Their greatest threat is death from lead poisoning when they scavenge the remains of deer that have been shot with bullets that still contain the lethal heavy metal.
它们面临的最大威胁首推中毒：当它们享用被子弹打死的鹿的尸体时，其中残留的重金属对秃鹫来说是致命的。
When advancing and uncovering coal in roadway, better construction method is vibration shot, metal framework, borehole bleed-off and hydraulic hole, of which vibration shot is principal.
井巷掘进揭煤时，较好的施工方法是震动放炮，金属骨架，钻孔排放和水力冲孔，尤以震动放炮为主。
The air entrapment of the liquid metal flow in the shot sleeve during the slow shot phase is one of the factors resulting in this kind of defect.
气孔是压铸生产中的常见问题，导致这一缺陷的原因之一就是在慢压射过程中压室内的金属液流动卷入了气体。
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