(pos:連詞)(sim:時)
<explanation>
yue:連接兩種間中交替出現嘅情況（一時⋯⋯一時⋯⋯）
eng:sometimes..., but other times...
<eg>
yue:佢個病一時好，一時壞。 (keoi5 go3 beng6 jat1 si4 hou2, jat1 si4 waai6.)
eng:His illness sometimes gets better, but sometimes gets worse.
<eg>
yue:你一時又學芭蕾舞，一時又學唱歌，結果冇樣叻。 (nei5 jat1 si4 jau6 hok6 baa1 leoi4 mou5, jat1 si4 jau6 hok6 coeng3 go1, git3 gwo2 mou5 joeng6 lek1.)
eng:You switch back and forth between learning ballet and learning singing. As a result you are not good at either.

(pos:副詞)(sim:一時間)(sim:霎時間)
<explanation>
yue:短時間內；#突然；#忽然
eng:in a moment; for the moment
<eg>
yue:一時感觸 (jat1 si4 gam2 zuk1)
eng:to get touched; to get impressed
<eg>
yue:我一時諗唔起。 (ngo5 jat1 si4 nam2 m4 hei2.)
eng:I cannot think of it for the moment.