be made of

be made of的用法和樣例：

People used to test coins that were offered in payment, to see if they rang true or were made of false metal.
過(guò)去人們在收到付款時(shí)，常常試扔一下硬幣，聽(tīng)聽(tīng)其聲音是真的，還是由假金屬制作的。
The fence was made of posts joined together with wire.
籬笆是以鐵絲連接起木樁而構成的。
Light often behaves as if it were made of particles.
光常常表現出好象它是由粒子組成似的。
The doors of the palace were made of beaten gold.
宮殿的門(mén)由金箔做成。