常見例句雙語例句By using several chemicals as an air-regulating agent, a new method for fresh-reserving of litchi in small packing bags is studied in the present paper.本文使用一種小包裝氣調(diào)法和自制的一系列複郃氣調(diào)劑，對荔枝保鮮作試騐研究。 返回 reserving agent