The father catches the boy twice, but the third time steps back and lets him fall.

父亲接住了孩子两次，但第三次的时候后退了一步让他跌倒。

Time steps of this simulation are shown in Figure 5, although the real-time visualization is much more interesting.

这个模拟的时间步长如图5所示，但是实际的可视化会更加有趣。

We adopted different time steps for the calculation of the flow and temperature field, which improve the efficiency greatly.

通过对流场及温度场分别采用不同的计算域和时间步长，大大提高了计算效率。

Winter vacation short and happy, I just want to keep time steps, again several winter vacation, experience a few funny thing happened.

寒假短暂而愉快，我多想留住时间的脚步，再多过几个寒假，多经历几件趣事。

The analytical procedure consists of earthquake stage and post-earthquake stage, and each stage is subdivided into several time steps.

整个计算过程分为地震阶段和震后阶段，每个阶段再划分若干时段。