英和和英

Fifteen seconds

Two seconds.

A period of two seconds.

every second

a second

3 seconds flat

a duration of time lasting one second

a second time

a second time

for a split second

in a fraction of a second

mere five minutes

at 15 meters a second

within 10 seconds

a ten‐second delay

for an instant

Sixty seconds make a minute.

The lights will come on in a few seconds.

a second stringer

in a second

break the ten second barrier

a basic unit of time, called second

vibrations per second

an angle of 10 arcseconds

get a second

one thousand periods per second

cycles per second

the second moment around the mean

have a lead of 20 seconds

second the motion