Decibel, abbreviated as dB.
关心 would be a better choice
担心 means worry
关心 means like he care for you something like that
Answer:
Science can be defined as the intellectual and practical activity encompassing the systematic study of the structure and behaviour of the physical and natural world through observation and experiment.
Explanation:
The idea of science is a set of rational knowledge by man, which can be confirmed by experimentation.
In some cases, the conclusion, assertion, and scientific theories are certain or probable. This is because scientific theories are characterized by assumptions.
Most times, the scientific knowledge are rational knowledge. The knowledge does not encompasses historical ideas and metaphysical ideology. Upon this, some authors concluded that the most common concepts about science are considered incomplete.
