manned

the chaplaincy was formerly manned by the cathedral.

a manned mission to Mars.

manned himself for the battle ahead.

a manned spacecraft; several manned lunar landings.

several manned lunar landings

three sailors manned the inflatable.

the firemen manned the pumps and fought the blaze.

he manned himself with dauntless air.

The management manned the ship with experienced hands.

Basing on introducing biological rhythms,especially the space biological rhythms,the paper gives an idea to develop the space chronobiology according to the needs of manned space flight in the fut.

Literature synthesis This paper was summarized in 3 aspects: radiation risk in manned space flight, biological effect of space radiation injury and trend of research on radioprotector.