English ⇄ Chinese

free fall ['fri:'fɔ:l]
agric., water.suppl.	自由跌落
avia.	自由下落 (无制导，无推力，无减速装置); 沿开普勒轨道下落 (重力与惯性力平衡); 开伞前降落 (伞降中降落到预定高度由跳伞员自行开伞或自动开伞); 标准重力加速度 (其值为9.8米/秒)
hydroel.st.	自由降落
met.	自由落下
outd.	自由落体式蹦极
securit.	任意下跌股价急速下跌，未遇阻力
skydive.	自由坠落
space	自由下落; test自由落体试验
tech.	自由投放; 自由落料
free-fall ['friːˌfɔːl, -ˌfɒːl]
gen.	自由下〔坠〕落; 自由沉降
avia.	自由投放
English thesaurus
free fall ['fri:'fɔ:l]
abbr.	ff
mil., logist.	Phase of the drop during which the paratrooper or the load falls because of his own weight. It ends when the parachute starts working (FRA); A parachute maneuver in which the parachute is opened, either manually or automatically, at a predetermined altitude. (FRA)
USA	A parachute maneuver in which the parachute is manually activated at the discretion of the jumper or automatically at a preset altitude (JP 3-17) see also airdrop, air movement, free drop, high velocity drop, low velocity drop

free-fall: 87 phrases in 16 subjects

Aviation	15
Bridge construction	1
Drilling	2
Electronics	2
Engineering geology	5
Explosives and Explosive Ordnance Disposal	1
Hydroelectric power stations	2
Metallurgy	1
Nautical	5
Oil / petroleum	4
Physics	3
Shipbuilding	3
Skydiving	7
Space	5
Sports	2
Technology	29