consider
thread ends
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→si1xu4 • sīxù
train of thought
train of thoughts, thoughts, thinking
他 的 思緒 被 雜事 打亂 了。
His train of thought was disrupted by trivial matters.
讀書 幫助 我 集中 思緒。
Reading helps me focus my (trains of) thoughts.
他 的 思緒 紛雜。
His trains of thoughts are in disorder.