求翻译：在配有冷凝管的100 mL三颈烧瓶中，加入20 mL无水乙醇和1.2 g金属钠，用装有无水氯化钙的干燥管塞住冷凝管上口，搅拌并加热维持反应液微沸。是什么意思？

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In placing the condensation pipe of 3 100 mL neck flask, by adding 20 mL anhydrous ethanol and 1.2 G sodium metal, using a calcium chloride in anhydrous dry tube live condensation pipe effortlessly, mixing and heating the reaction liquid micro-boiling.

In has in 100 mL three neck flasks which prolongs, joins 20 mL absolute ethyl alcohol and 1.2 g metallic sodium, with is loaded with the anhydrous calcium chloride drying bulb to block prolongs the upper opening, stirs and heats up the maintenance response fluid micro to boil.

Equipped with condensing tube of 100 mL in three-neck flask, add 20 mL of anhydrous ethanol and 1.2 g of metallic sodium, drying tube plug equipped with anhydrous calcium chloride condensation pipe around, mixing and heating to maintain reaction liquid micro-boiling.

Equipped with condensing tubes of three neck flask 100 mL, joined 20 mL anhydrous ethanol and 1.2 g sodium metal, fitted with dry pipe is blocked of anhydrous calcium chloride condensation pipe around, mixing liquid micro-boiling and heating to maintain reaction.