- stand straight as a ramrod
- 身子: body
- 挺: stick out; bulge or protrude ...
- 得: need
- 笔直: very straight
- 笔直: rectitude; perfectly straight; straight as a ramrod; bolt upright 笔直的马路 straight avenues; 笔直的树 an upright tree; 笔直走 go straight on; go straight ahead; 身子挺得笔直 stand straight as a ramrod; draw oneself up to one's full height
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