例句與造句

1. A mercury trap has to be added as a check valve, and the middle bulb is filled with an inert porous material, e . g . pumice, onto which one of the precursors is dropped.
2. "It constitutes a clear case of toxic trade, " said Nityanand Jayaraman, an environmental activist in India, " where a country that knows the dangers of mercury and is taking action to get out of the mercury trap has no problems exporting the problem to India ."
3. It's difficult to find mercury trap in a sentence. 用mercury trap造句挺難的