Endeavour was set to launch in late April, but an electrical problem in a heater circuit forced a delay. Engineers replaced the switchbox and installed new wiring.

奋进号原订四月下旬发射，但是由于加热器中电路发生问题，被迫延期。工程人员更换了电路开关盒，并且安装了新线路。

youdao

Endeavour was set to launch in late April, but an electrical problem in a heater circuit forced a delay. Engineers replaced the switchbox and installed new wiring.

奋进号原订四月下旬发射，但是由于加热器中电路发生问题，被迫延期。工程人员更换了电路开关盒，并且安装了新线路。

youdao