regular brushing is the linchpin of all good dental hygiene.
经常刷牙是保持牙齿卫生
关键。
;;
;;
;
可
, ;regular brushing is the linchpin of all good dental hygiene.
经常刷牙是保持牙齿卫生关键。
Reduced spending is the linchpin of their economic program.
减
支出是这个经济计划关键
the linchpin upon which success or failure depends
成败关键
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