Care is needed when loading the roll to prevent twisting or kinking the film...装胶卷时要小心，别使胶片扭结。Describes the static calibration methods of accelerometer: gravitational attraction method, loading method and centrifuge meth...
Helen was diffident and reserved.海伦比较害羞内向。He has a politely diffident manner.他的态度是客气中带有羞怯.In the diffident manner was nothing of the art of the courtesan.她羞怯的举止迥然不同于妓女的惺惺作态....