When nested with sand between them, they last just long enough to let the titanium cool into beads of solid metal.
在两层花盆之间，加入沙的内衬可以让钛有足够的时间冷却成钛珠。
Cooling like beads of molten metal.
像熔化后的金属的水珠在慢慢冷却。
Nowadays, abaci are often constructed as a wooden frame with beads sliding on wires, but originally they were beads or stones moved in grooves in sand or on tablets of wood, stone, or metal.
如今，算盘往往建造在电线与滑动珠子木框架，但是最初他们是珠子或石头，在沙槽移动或木材，石头或金属片。
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