yǐ / zhǒng / shè / xiàn / chuān / tòu / lì / jiào / ruò / dàn / réng / rán / xū / yào / shì / dàng / de / fáng / hù

乙种射线穿透力较弱，但仍然需要适当的防护。

Beta rays have relatively weak penetrating power, but proper protection is still necessary.