登录
a set of ideas intended to explain the reason behind the existence or occurrence of something
理论, 学说
a written or spoken piece of information or communication sent to or left for another person
信息, 讯息
a difficult and new task that puts one's skill, ability, and determination to the test
挑战, 考验
a unit of measurement for temperature, angles, or levels of intensity, such as Celsius degrees or a degree of pain
度
knowledge about the structure and behavior of the natural and physical world, especially based on testing and proving facts
科学
an emotional state or sensation that one experiences such as happiness, guilt, sadness, etc.
感觉, 情感
the part, position, or point of something that has an equal distance from the edges or sides
中间, 中心
a suggestion or an opinion that is given with regard to making the best decision in a specific situation
建议, 忠告
the physical activity between individuals involving the sexual organs, done for pleasure or to produce babies
性, 性行为
an electronic device with a screen that receives television signals, on which we can watch programs
电视, 电视机
