ultrasonics 超声学) m) C% @8 L6 p. w
electricity 电" l1 B- ` B% v7 B
static electricity 静电: _) k" i8 M b; ^8 G
magnetism 磁性,磁力 . j' t( o+ L" J0 C7 U3 g3 j# q magnet 磁体 # e8 C4 J8 c! H% _) {- G/ D* C electromagnet 电磁 & N1 G/ ^9 d+ S# o. h$ Z magnetic field 磁场4 b# D4 A Y+ {) C1 _$ H
electric current 电流" U( N! Q/ `$ _4 O
direct current (DC) 直流电 " N$ H. L' |! J7 X( B" Q alternating current (AC) 交流电: J8 ]% n A+ Q3 Q; ~! ~$ x# ]2 \( R
electric circuit 电路, O& Y/ O' I% ]( A0 }' r
electric charge 电荷7 G& x, S% j9 i# R
electric voltage 电压 ' a' o- F$ b7 E! @- Y n electric shock 触电: Y/ ~( a2 ^1 ^. g
electric appliance 电器 0 H# A" ?" ]+ x7 @; o conductor 导体$ O" t1 U: Z. {6 P0 d N
insulator 绝缘体