dorsal system的用法和樣例：
例句
- A full-scale biofiltration system was installed for off-gas treatment of a burley tobacco processing plant.
一套大型生物過濾系統被用于白肋煙加工車間的尾氣處理。 - While the system and country have weaknesses and challenges, the Sinological landscape is littered with its naysayers and critics.
中國及其體制存在軟肋和挑戰，而學者對該國的看法不乏否定和批評。
