動詞 slow:

1. lose velocity; move more slowly
   同義詞：decelerate, slow down, slow up, retard
2. become slow or slower
   同義詞：slow down, slow up, slack, slacken
3. cause to proceed more slowly
   同義詞：slow down, slow up

形容詞 slow:

1. not moving quickly; taking a comparatively long time
2. at a slow tempo
3. slow to learn or understand; lacking intellectual acuity
   同義詞：dense, dim, dull, dumb, obtuse
4. (used of timepieces) indicating a time earlier than the correct time
5. so lacking in interest as to cause mental weariness
   同義詞：boring, deadening, dull, ho-hum, irksome, tedious, tiresome, wearisome
6. (of business) not active or brisk
   同義詞：dull, sluggish

副詞 slow:

1. without speed (`slow' is sometimes used informally for `slowly')
   同義詞：slowly, easy, tardily
2. of timepieces
   同義詞：behind

1. This student is slow in learning English.
   這個學生學英語很笨。
2. My watch is five minutes slow.
   我的表慢五分鐘。