单词：coils
n a round shape formed by a series of concentric circles (as formed by leaves or flower petals)
n a transformer that supplies high voltage to spark plugs in a gasoline engine
n a contraceptive device placed inside a woman's womb
n tubing that is wound in a spiral
n reactor consisting of a spiral of insulated wire that introduces inductance into a circuit
v to wind or move in a spiral course
v make without a potter's wheel
v wind around something in coils or loops
coils的用法和样例：
例句
- The magnetic signals are sensed by induction coils.磁信号由感应线圈所检测。
- A linear differential transformer has three coils.一个直线差动变压器有三个线圈。
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