original passage: A semiconductor diode is a device typically made from a single p–n junction. At the junction of a p-type and an n-type semiconductor there forms a depletion region where current conduction is inhibited by the lack of mobile charge carriers. When the device is "forward biased" (connected with the p-side at higher electric potential than the n-side), this depletion region is diminished, allowing for significant conduction, while only very small current can be achieved when the diode is "reverse biased" and thus the depletion region expanded.
original sentence: At the junction of a p-type and an n-type semiconductor there forms a depletion region where current conduction is inhibited by the lack of mobile charge carriers.
sentence2: Is the current conduction being prevented?
sentence1: A semiconductor diode is a device typically made from a single p–n junction. At the junction of a p-type and an n-type semiconductor there is a lack of a depletion region, so current conduction is inhibited by the amount of mobile charge carriers. When the device is "forward biased" (connected with the p-side at higher electric potential than the n-side), this depletion region is diminished, allowing for significant conduction, while only very small current can be achieved when the diode is "reverse biased" and thus the depletion region expanded.