I think this will be a good course for us to scientific English.

spread before the eyes of

feat was performed

there is nor weight nor gravity in space

deprive ...of ...=taken away

previous to = beofre

be fitted with

be suited with

attach to=fix

simultaniously=at the same time

diffuse= spreads out freely

realm =feilds,area

weightlessness

effect on

launch the spaecships

send into the orbit

perform expeiments=do experiments

working abroad the space station

serve as

be equipet with

make it possiple to do sth

float around in the air

time your exercise