Sittang

例句：

1. 1. The Sittang mine is a major source of tin in China.
   锡唐矿是中国主要的锡矿来源。
2. 2. The Sittang mine has been producing high-quality tin for decades.
   锡唐矿几十年来一直生产高品质的锡。
3. 3.Due to the decline in demand, the price of Sittang tin has fallen significantly.
   由于需求的下降，锡唐锡的价格已经大幅下降。