理解为人们用这项技术做什么,从而答成了:We use them to unlock a smart phone, get into our home. 翻译句子难度上和去年差不多,This technology is all around us in our life. 这项技术在我们生活中随处可见/无处不在/广泛使用。只不过其中的around 有“围...