将鱼单独放置一周后，罗里再次将红色标志块放入鱼缸中。

After leaving the fish alone for a week, Rory placed the red Logo block in the tank again.

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在做颗粒分离实验时，研究人员在一块大乐高板上插满了圆柱状乐高钉，然后把板垂直放入盛满粘性液体甘油的鱼缸。

For the particle-separation experiments, the researchers covered a large Lego board with cylindrical Lego pegs and placed the board vertically in a fish tank filled with glycerol, a viscous liquid.

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