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简直郁闷.
Comets grow tails only when they get warm enough for ice and dust to boil off. As a comet's orbit brings it closer to the Sun, first the coma grows, then two distinct tails usually form. One, the less common kind, contains electrically charged (i.e., ionized) atoms of gas,
which are blown off directly in the direction away from the Sun by the magnetic field of the solar wind. The other tail is made of neutral dust particles, which get gently pushed back by the pressure of the sunlight itself. Unlike the ion tail, which is straight, the dust tail becomes curved as the particles follow their own orbits around the Sun.
问distinct 的同义词:
答案有1. visible 2. gaseous 3. separate 4. new 答案为3.
我觉得都不好. 这里的distinct 应该解释为different 会比较好一点. 在现有的答案里面, 我在1. 3里面徘徊, 最后选了1.
感觉是: 如果说sth is distinct, 有个意思是it can be clearly seen, heard, smell, etc. separate 有点沾边, 但感觉不爽.
大家是怎么样想的?
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