At dawn（黎明时）/æt dɔn/, Nora climbed a ladder（梯）/'lædә/ to the new weather hut（小屋）/hʌt/ on Raven Ridge. Its altitude（海拔）/'æltitju:d/ was one kilometer above the valley（在山谷上方）/əˈbəv ðə ˈvæli/, and the road curved（曲线）/kә:v/ along a dense（密集的）/dens/ slope（斜坡）/slәup/. Dew（露珠）/dju:/ shone like a jewel（珠宝）/'dʒu:әl/ on each metal rod（竿）/rɒd/. A pigeon（鸽子）/'pidʒin/ and a dove（鸽子）/dʌv/ continued to cling（紧抓）/kliŋ/ to the roof until the station began to hum. Nora checked the compass bearing（方位）/'bєәriŋ/, the sphere（球）/sfiә/-shaped wind sensor, and the camera lens. The gorgeous（壮丽的）/'gɒ:dʒәs/ horizon（地平线）/hә'raizәn/ looked moderate（温和的）/'mɒdәrәt/, but the screen showed considerable（相当大的）/kənˈsɪdərəbəl/ pressure change and a weird（怪异的）/wiәd/ rise in temperature.

“The literal（逐字的）/'litәrәl/ reading says severe hail（冰雹）/heil/ by twelve o'clock. We should isolate（关闭）/'aisәleit/ the tunnel（隧道）/'tʌnl/ now.” “A loose stem（支杆）/stem/ may distort the curve. Let me retain（保留通行）/ri'tein/ traffic while I test it.” Pavel argued that waiting until midday（中午）/'middei/ could put a whole procession（车队）/prә'seʃәn/ of buses at risk. Nora replied that closing the road also had an ethic（伦理）/'eθik/: evidence should guide a decision（指导决定）/gaɪd ə dɪˈsɪʒən/ that affected every mate（同伴）/meit/ trying to reunite（团聚）/.ri:ju:'nait/ with family.

They began calibration（开始校准）/bɪˈgæn ˌkæləˈbreɪʃən/. Nora used gum（树胶）/gʌm/ to mark the old setting, then raised the sensor to elevate（抬高）/'eliveit/ it above the hut. She discarded（丢弃）/dis'kɑ:d/ a torn cover and used an ax（斧头）/æks/ to trim a branch that might spur（引发）/spә:/ false movement. Inside, a small heater made the room feel like a living-room（客厅）/living-room/, so Pavel opened a vent to let heat dissolve（散去）/di'zɒlv/ into the air. A model spaceship（宇宙飞船）/'speisʃip/ hung from the ceiling, a reminder that weather, geology（地质学）/dʒi'ɒlәdʒi/, and the wider cosmos（宇宙）/'kɔzmɔs/ had fascinated（使着迷）/'fæsineit/ the station's founder.

“I need more than a glimpse（一瞥）/glimps/. Do I disable（停用）/dis'eibl/ the tunnel signs or keep the road open（保持道路开放）/kip ðə roʊd ˈoʊpən/?” “The second sensor confirms the quake（剧烈震动）/kweik/ of air pressure. Close it for the sake of safety（为了安全）/fər ðə seɪk əv ˈseɪfti/.” Nora saw daylight（日光）/'deilait/ fade toward sudden dusk（黄昏）/dʌsk/, though it was only sometime（某个时候）/'sʌmtaim/ after eleven. She took a sip（啜饮）/sip/ of tea and compared both instruments. Their readings now matched. The first curve had not been a scandal（丑闻）/'skændәl/ or simple fault; hail really was moving over the horizon.

June ordered a temporary closure（临时关闭）/ˈtɛmpərˌɛri ˈkloʊʒər/ before noon. Workers would pave（铺设）/peiv/ no new section and drivers would use the lower route. The decision required willpower（意志力）/'wilpauә/ because complaints arrived immediately, but safety outweighed convenience（比便利更重要）/aʊtˈweɪd kənˈvinjəns/. Lately（近来）/'leitli/, crews had ignored several moderate warnings, and Nora did not want habit to rip（撕裂）/rip/ trust apart. At dusk, the teams would reunite and review every bearing. For now, the tunnel signs flashed, the ridge disappeared behind hail, and the station proved its sake（用途）/seik/: turning a strange signal into responsible action.