Definition: not easy to break or damage Level: C2
建筑材料必须坚固以承受恶劣条件。
Construction materials must be ___tough to withstand harsh conditions.
户外爱好者喜欢耐用的装备。
Outdoor enthusiasts prefer ___tough gear for durability.
这种面料出奇地坚韧，抗撕裂和磨损。
This fabric is surprisingly ___tough, resisting tears and abrasions.
