Sacs
n. （动植物组织中的）液囊( sac的名词复数 )
🗣️ 情景例句
the voters will have a clear choice.
投票人可以有明确的选择。
To graduate from the university
大学毕业
It was noticed that there were no signs or warnings on the supply lines that ran round the port.
人们这才注意到，铺设在码头周围的供应管道上没有贴标签或告示。