少年阶段 Adolescence Stage
青少年阶段 teenager stage
少儿进阶英语 ROCKET ENGLISH
泡泡少儿英语进阶级 POP Steady
泡泡少儿英语进阶级2 POP Steady
泡泡少儿英语进阶级1 POP Steady
泡泡少儿英语进阶级4 POP Steady
此方案的特点是修正阶数少、有理化附加误差较小。
The particular features of the scheme are fewer order of corrections and that smaller error is introduced by rationalization.
边界元法是一种新的数值计算方法，与已有的其它数值方法相比，具有方程组阶数低、输入数据少、占有内存少、速度快等优点。
The BEM is a new method of numerical calculation compared with other methods. It has many advantages, such as smaller order of equation, less data input, less internal storage and faster velocity .
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