Past studies of potential space food have considered poultry, fish and even snails, newts and sea urchin larvae, but they all have downsides.是什么意思_Past studies of potential space food have considered poultry, fish and even snails, newts and sea urchin larvae, but they all have downsides.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句