例句與造句

1. Based on the extremely low K sp values for heavy metal sulfides, if [ SEM ] / [ AVS ] is less than 1 ( [ SEM < [ AVS ] ), then all the extractable metals in the sediment should be in their solid sulfide form and non-bioavailable; above this value, the pool of sulfide is " exhausted " and heavy metals are more likely to be present in the sediment pore water, their bioavailable form.
2. It's difficult to find extractable metal in a sentence. 用extractable metal造句挺難的