a gas burner used in laboratories; has an air valve to regulate the mixture of gas and air

bunsen : german chemist who pioneered in spectrum analysis and codiscovered the elements casium and rubidium. he introduced the bunsen burner in1855.

本生：德国化学家，是光谱分析领域的先驱，与人合作发现了铯和铷两种元素。1855年发明了本生灯。

the bunsen burner is so named because it is thought to have been invented by robert burnsen, who was german by birth.

本生灯的命名，人们认为是因为它是德国人罗伯特·本生发明的。

test b: bunsen burner a 3/8〞bunsen burner was adjusted to a quiet flame with a 1-1/2〞inner blue cone and then overturned on the test material, exposing material to the flame for 5 minutes.

测试b：煤气喷灯。将一个3/8〞 的煤气喷灯调到稳定的火焰使其蓝色锥形内焰为1-1/2〞，然后，将煤气喷灯翻转，是火焰接触所测试的材料5分钟。

have a friend squeeze the mylar balloon gently while you attempttolight the bunsen burner with a match orsparkigniter.

有一个朋友挤薄膜气球缓缓而您试图点燃本生灯的比赛或火花点火。

german chemist who pioneered in spectrum analysis and codiscovered the elements casium and rubidium. he introduced the bunsen burner in1855.

本生：德国化学家，是光谱分析领域的先驱，与人合作发现了铯和铷两种元素。1855年发明了本生灯。

bunsen burner invented by german chemist robert bunsen.

德国化学家罗伯特·本生发明本生灯。

first , i take a beaker of water and heat it gently over a bunsen burner .

首先，取一烧杯的水，在本生灯上微微加热。