To improve the stability of vaccines comprising aluminum salt, the invention uses the amino acid histidine. The first compensation polarizing film includes a polarizing film having an in-plane retardation of 35 to 245 nm, wherein n1\u2267nz>n2, wherein n1 and n2 are refractive indexes of optical axes extending perpendicular to each other within the first retardation film and nz is a thickness-direction refractive index of the first retardation film. The indicator specifies whether the transport data block is to be communicated by the transport network using the first QoS bearer or second QoS bearer. The page loading of the web page is then simulated based on the adjusted timing information of each web object and the PDG of the web page to estimate a new PLT of the web page. When the driving mechanism is not operated, each link resists actuation and holds the running board in a fixed position relative to the frame.