He pinned up the notice with a thumbtack.
他用图钉将通知挂起来。
Someone pulls the thumbtack out of the tire, which makes it hard for the owner to find where the hole is.
有人按了图钉再拔下来，这样车主找不到窟窿在哪儿，补胎时更困难。
Someone pulls the thumbtack out of the tire, which makes it hard for the owner to find where the hole is.
有人按了图钉再拔下来，这样车主找不到窟窿在哪儿，补胎时更困难。
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