Primary Bamboos的用法和樣例：
例句
- Wood was once their primary fuel, but the region's forests were largely denuded by the early 1900s.
但是很不幸，大多數的貴州居民除了煤就沒(méi)有其他選擇。 - Primary gold ore from Bangi, Guizhou, belongs to a clastic-type, finely disseminated, refractory particles.It is difficult to extract gold from the ore by cyanide infusing.
貴州板其原生金礦石屬碎屑巖類(lèi)微細浸染型難選冶礦石，在氰化浸出之前需進(jìn)行預處理。
