1

现在

xiànzài

now; at present; currently

2

牡蛎

mǔlì

oyster

3

当季

dāngjì

this season; the current season

=4

吗

má

(coll.) what?

=4

吗

mǎ

used in 吗啡 mǎfēi

=4

吗

ma

(question particle for "yes-no" questions)