技术人员在大约那个时候拿到了该航天器热盾的核心样品，二月份，为了进一步测试，猎户座的背壳和热盾被移除。

While technicians took core samples of the spacecraft's heat shield around that time, in February Orion's back shell and heat shield were removed for further testing.

youdao

本文介绍了一种同步测周期计数器的设计，并基于该计数器设计了一个高精度的数字频率计。

The design of a counter measuring synchronous period is introduced in this paper. And based on it, a high precision digital cymometer is designed.

youdao

初步测试结果表明，检波器在共振频率以上有较好的频率响应，输入信号与输出信号吻合得较好。

Preliminary test results indicated that the accelerometer has better frequency response well above the resonant frequency, and the output signal is in correspondence with the input.

youdao