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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]...
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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....
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heliograph的现在进行时为：heliographing...
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heliograph的一般过去时为：heliographed...
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heliograph的第三人称单数（三单）为：heliographs...
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heliograph的复数形式为：heliographs...
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heliograph的现在完成时为：heliographed...