Monosystem
单系
🗣️ 情景例句
We also like to know
我们还想知道，
Our family always has a traditional Christmas.
我们家每年都要庆祝传统性的圣诞节。
there is no evidence that the total amount of activity is any less.
但没有迹象表明，其活动总量有任何减少。