Spiroheptane
螺[3.3.]庚烷
🗣️ 情景例句
And right now, he needs a friend.
而且现在， 他需要一个朋友。
Our foreign trade policy has always been based on equality and mutual benefit and exchange of needed goods.
我们的对外贸易政策一向是以平等互利、互通有无为基础的。
In 1995, there was a very big race.
1995年举行了一次盛大的比赛。