在新年的第一个清晨,许多老年人早起,他们坚持反富或挂在门口的一些对联。
On the first early moring of one year, many senior citizen get up early and they stick the reversed Fu or hang some couplets on the front door.
反坡富水岩溶隧道施工的主要难题是反坡抽排水,而快速有效地排除反坡施工地段的积水,对隧道的施工组织和现场管理影响重大。
Drainage in a reverse slope is the primary problem in the construction of a tunnel in a reverse-slope stratum with abundant water.
报道了超声辐射下合成顺、反2,6-二苯基1,4-二硒富烯的简便方法,讨论了其反应机理.。
A convenient and simple method for the synthesis of ets and trans-2,6-diphenyl-1,4-diSelenafUlvenes under ultrasound conditions is described. The reaction mechanism is brieny discussed.
报道了超声辐射下合成顺、反2,6-二苯基1,4-二硒富烯的简便方法,讨论了其反应机理.。
A convenient and simple method for the synthesis of ets and trans-2,6-diphenyl-1,4-diSelenafUlvenes under ultrasound conditions is described. The reaction mechanism is brieny discussed.
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