常見(jiàn)例句

• The machine rests on a bed of concrete.
  機(jī)器安裝在混凝土基座上。
• Every bicycle should have a bell on it for safety.
  爲(wèi)了安全，每輛自行車(chē)都應(yīng)該安裝車(chē)鈴。
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