One striking characteristic of Gelidium is that it must be wild-harvested rather than farmed. Unlike Gracilaria for culinary agar production, Gelidium grows slowly and thrives only in cold, turbulent waters over rocky seabeds, conditions nearly impossible to replicate in aquaculture. This dependence on wild harvesting explains the need for seaweed collectors during WWII, and continues to make Gelidium a strategically critical resource.
100x speedup is achieved by comparing HH with bidirectional A*.
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美國學者戈登表示，該條文原意在保護美國企業，避免受到依賴強迫或監獄勞動的進口商品競爭，如今也成為美國調查企業海外供應鏈勞動條件的重要工具。
Ultimately, the most rigorous traceability solutions, including QR codes and microchips, won't be useful if people don't actually check them as a condition of making their purchases. Imitators can simply counterfeit QR code labels, for example.