The heliograph must thus be carefully aligned in the first instance.回照器在开始时就要小心地对准....

n.照相制版，太阳摄影机，日光仪v.用太阳摄影机拍摄，用日光仪传递...

heliograph的现在完成时为：heliographed...

heliograph的第三人称单数（三单）为：heliographs...

heliograph的一般过去时为：heliographed...

heliograph的音标：heliograph的英式发音音标为：['hi:liəgrɑ:f]heliograph的美式发音音标为：['hiliəgræf]...

heliograph的复数形式为：heliographs...

heliograph的现在进行时为：heliographing...