Uncooled bi-material infrared detectors have the potential of approaching the theoretical limit of noise equivalentdifference in temperature because of its high sensitivity and low noise.
非致冷双材料室温红外探测器具有高响应率和低噪声的特点，噪声等效温差接近理论极限。
2
The difference in value between a broadcast viewer and an online equivalent is around three to one.
广播观众和在线观众的价格差异大约是三比一。
3
When you think about what that adds up to over 20 years, you realise that it's hugely significant; in fact, it's equivalent to the difference between the US and Ethiopia.