You can imagine her mixed emotions while striving to stifle her amusement and at the same time to understand that the poor rushee had never smoked before.
一方面,她努力抑制着自己,不让自己笑出声来;另一方面,她又理解这个可怜新生──她以前从未吸过烟。
The stifle joints must point in the line of travel, not outward resulting in a bowlegged appearance nor hitching in under the dog.