This cab signaling device is fail - safe and has highly reliability and - interference .数字化双制式机车信号符合故障 - 安全原则,可靠性高, 抗干扰能力强.It is becoming accepted practice that jet aircraft must " fail safe " .喷气式飞机必须有故障 安全装置,这已经逐渐成为公认的...
The fire engines were just pulling up, sirens blaring.消防车正要停下来，警报器发出刺耳的声音。She heard the sirens scream their unearthly wail.她听到警报器发出可怕的尖叫声。Police cars, their sirens wailing, accompanied the lorries.警车护送着大卡车，一路警笛长鸣。...
As I exited the final display, I entered a hexagonal room...我从最后一个展厅里出来，走进一个六角形的房间。A method for determining the hexagonal polytypes of silicon carbide using the Laue pattern is described.本文提出了用X射线 劳埃法鉴定SiC六方多型体类型的方法.The ...
The appearance of EOS meets the need of the supermarket enterprises development.电子订货系统(EOS)的出现,顺应了连锁超市企业发展的要求.He lifted a lot of things from the supermarket.他在超市偷了许多东西。Now that genetically modified foods are on our super...
the Isle of Skye斯凯岛Watch the tide come in, and check weather on Skye.观看潮汐请进, 并观察斯凯岛的天气.On Skye's Trotternish Peninsula, basalt pinnacles loom over the Sound of Raasay.在斯开岛的特洛登尼许半岛, 玄武岩尖塔俯瞰着拉塞海峡....
他强调地指出,有些畸形构造常常共存, 而有些则很少同时共存.He was forcibly remarked that certain malconformations frequently, and others rarely co - exist.他强调地指出.He pointed out emphatically....