These machines can accept payment through facial recognition______ a matter of seconds.
A. in
B. as
C. for
Both Alipay and WeChat are gradually laying ____ the face-scanning payment market.
A. down
B. in
C. out
The convenience brought __________ mobile payment is obvious.
A. from
B. in
C. by
Biotechnology (生物技术) is gradually being introduced _______ the market.
A. from
B. into
C. by