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Article summary:

1. Hydrogels are promising materials for various applications due to their biocompatibility and ability to maintain their structure. However, most hydrogels are mechanically weak and brittle, limiting their practical use.

2. Recent advances in hydrogel design, such as double-network (DN) hydrogels, have improved their mechanical properties by incorporating sacrificial bonds. However, there is still a trade-off between toughness and strength in these hydrogels.

3. The challenge lies in reconciling the conflict between mechanical performance and processability. Conventional photocuring hydrogels offer fast preparation but lack mechanical strength, while tough/strong hydrogels require lengthy preparation times. Achieving both fast preparation and high mechanical performance remains a challenge in the field of hydrogel materials.

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