Other aquatic insects like water treaders exploit surface tension, just like thumbtacks and paper clips.
其他水生昆虫,如水蟑螂,就像图钉和回样利用表面张。
The treaders move in unison and in silence, except for the marcador, who marks the time.
迪娅:除了马卡多, 踩踏者默不作声地致行动,他在计时。
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