“trillionth”簡單造句，trillionth造句子

It was found in concentrations of 29 to 850 pico grammes per cubic metre of air. A micro gramme is one trillionth of a gramme.

The X-ray pulses have a shutter speed of less than 100 femtoseconds (100 femtoseconds = 1/10 of a trillionth of a second).