Troubleproof
a. 不生故障的, 无故障的
🗣️ 情景例句
because we have a little surprise for you today.
因为今天我们要给各位一项惊喜。
He that would eat the kernel must crack the nut.
要把果仁吃，就得碎果壳。
Now, everyone. Listen, please.
同学们，请注意听。