正在确认阅读权限…
Why Some Wind Turbines Stop Spinning — Even When It’s Windy
为何某些风力涡轮机即使在有风时也会停止转动
精读先不看文字，完整听一遍。
-
Wind turbines shut down automatically when wind speeds exceed safe operating limits—usually above 55 mph.风速超过安全运行极限（通常为55英里/小时以上）时，风力涡轮机会自动停机。
-
Extreme winds risk mechanical stress, blade damage, or generator overload, so safety overrides energy production.极端大风可能导致机械应力、叶片损坏或发电机过载，因此安全优先于发电。
-
They also stop during scheduled maintenance, grid instability, or if local demand for electricity is very low.它们也会在计划维护、电网不稳定或当地电力需求极低时停机。
-
Ice buildup on blades changes their aerodynamics and adds dangerous imbalance, triggering automatic halt.叶片结冰会改变其空气动力学特性并造成危险的不平衡，从而触发自动停机。
-
Some farms use blade-heating systems or de-icing coatings, but many still pause until thawing occurs.一些风电场采用叶片加热系统或除冰涂层，但许多仍需等待解冻后才恢复运行。
-
Low wind speeds below 7 mph won’t spin the rotor enough to overcome friction and generate net power.风速低于7英里/小时时，转子无法克服摩擦力旋转，无法产生净电能。
-
Operators monitor turbine health remotely using vibration sensors, temperature readings, and power output logs.运维人员通过振动传感器、温度读数和功率输出日志远程监控涡轮机健康状况。
-
Curiously, turbines sometimes idle during high wind if neighboring turbines cause turbulent ‘wake effects’ downstream.有趣的是，当邻近涡轮机在下游造成湍流‘尾流效应’时，涡轮机有时会在大风中空转。
-
Grid operators may instruct pauses to balance supply and avoid overloading transmission lines.电网运营商可能指令暂停运行，以平衡供需并避免输电线路过载。
-
These intelligent stops reflect careful engineering trade-offs between reliability, safety, and sustainability.这些智能停机体现了可靠性、安全性与可持续性之间经过审慎权衡的工程设计。
精读 · 大约 10 分钟
听 → 读 → 学表达 → 懂 → 今天会说这一句 → 跟读录音 → 自己说一句。
③ 学 · 重点表达
- These intelligent stops reflect careful engineering trade-offs between reliability, safety, and sustainability. 这些智能停机体现了可靠性、安全性与可持续性之间经过审慎权衡的工程设计。
- Grid operators may instruct pauses to balance supply and avoid overloading transmission lines. 电网运营商可能指令暂停运行，以平衡供需并避免输电线路过载。
- Ice buildup on blades changes their aerodynamics and adds dangerous imbalance, triggering automatic halt. 叶片结冰会改变其空气动力学特性并造成危险的不平衡，从而触发自动停机。
④ 懂 · 选一选
⑤ 今天会说这一句
These intelligent stops reflect careful engineering trade-offs between reliability, safety, and sustainability.
⑥ 跟读并录音
These intelligent stops reflect careful engineering trade-offs between reliability, safety, and sustainability.
第一版：录下来、回听、再听标准音。系统打分以后再加。
⑦ 说 · 自己来一句
用今天的表达，自己说一句。
例子：These intelligent stops reflect careful engineering trade-offs between reliability, safety, and sustainability.
已记下。连续天数以后会显示在课表里。
陈老师指导
课程开发中，敬请期待。成人和孩子都可以先自学听读、精读。
这边的讲解音轨还在做。想先跟着老师走完固定 30 课，可以去陈老师带读社（和自学通行不是同一份会员）。
课程开发中，敬请期待。