神经连接网络一旦粘合就坚韧无比很难破坏。
That network of neural connections, once cemented, is tough to break.
高碳钢搅拌刀片，坚韧无比，不生锈，不钝化，寿命超长。
High-carbon steel mixing blade, extremely tough, non-rusting, non-passive, long life.
超高分子量聚乙烯的特性保证，这种塑料材质很轻，坚韧无比，耐化学腐蚀，具有优异的耐磨性。
UHMWPE properties ensure that this plastic material is very light, extremely tough, chemically resistant and has excellent wear resistance.
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