in circulation的用法和樣例：
例句
- Police say a number of forged banknotes is in circulation.
警方稱市面上有一定數量的偽鈔。 - After a month in hospital, she is back in circulation.
住了一個月的醫院后，她又重新活躍起來了。 - Police say a number of forged banknotes are in circulation.
警方稱市面上有一定數量的偽鈔。 - These ideas have been in circulation for some time.
這些想法已經流行了一段時間。
