英和和英

Two seconds.

A period of two seconds.

Fifteen seconds

every second

cycles per second

a second time

a second time

a ten‐second delay

a second

3 seconds flat

a duration of time lasting one second

vibrations per second

in a second

the second period

in a fraction of a second

for a split second

a second stringer

within 10 seconds

Sixty seconds make a minute.

one thousand periods per second

in second

start a countdown

second the motion

the second

the second

have a lead of 20 seconds

one million periods per second

a basic unit of time, called second

one trillion periods per second

The lights will come on in a few seconds.