Meanwhile, PEN's application faces a sensitive question that is how to decrease the cost.

同时指出，PEN瓶之开发应用，在当前尚面临降低生产成本这个十分敏感的现实问题。

youdao

Meanwhile, PEN's application faces a sensitive question that is how to decrease the cost.

同时指出，PEN瓶之开发应用，在当前尚面临降低生产成本这个十分敏感的现实问题。

youdao