英和和英

a locking system that uses a code as the key

Matsui Hideki Reaches 30-Homer Plateau

No.30 （number thirty）

do exercise 2 on page 30 for homework

We will issue a product key for your license renewal.

keys strung on a red cord

resetting password

A 30-gram sample of Cream-Lite

a code that changes its key at every block or bit

an encyclopedia of 30 volumes [vols.]

The trial period is for 30 days. Your account becomes invalid after the period.

I don't understand why the key lock function is influenced.

a time period of 30 years

a stopwatch that indicates times in a digital form

The lighthouse flashes at 30‐second intervals.

the 30th wedding anniversary

That switch lock can be released.

That switch lock will be released.

a {selecting switch}

Set off 30,000 fireworks

a time unit of approximately 30 days

He is 30 but he still doesn't work.

The railroad company decided to discontinue services on 30 deficit‐ridden local lines.

For code type locks that don't need a key there are 'free dial' systems where you can set any number you like and fixed types where the number if set in advance.

crack a code

a peace of 30 years

Have you found your car keys?

Nordic skiing

a key on a typewriter keyboard, called a backspace key

they worked for $30 and found