dorsal system的用法和样例：
例句
- A full-scale biofiltration system was installed for off-gas treatment of a burley tobacco processing plant.
一套大型生物过滤系统被用于白肋烟加工车间的尾气处理。 - While the system and country have weaknesses and challenges, the Sinological landscape is littered with its naysayers and critics.
中国及其体制存在软肋和挑战，而学者对该国的看法不乏否定和批评。
