·2,447,543篇论文数据，部分数据来源于NoteExpress
The center conditions and isochronous center conditions for a class of quasi - analytic systems were investigated.
研究了一类拟解析系统的中心条件与等时中心条件。
youdao
The center conditions and isochronous center conditions for a class of quasi-analytic systems were investigated.
应用推荐
模块上移
模块下移
不移动