挥手表示欢迎和告别，而挠头则表示不知所措。

Waving can mean welcome and farewell, whereas scratching your head may indicate that you are at a loss.

youdao

在胸前交叉双臂的姿势在芬兰代表骄傲，而在斐济则表示无礼。

Folded arms signal pride in Finland, but disrespect in Fiji.

youdao

约72%的“不退休”受访者表示，他们一退休就会重返岗位，以保持心理健康；59%的受访者则表示这一选择与维持生计有关。

About 72% of "unretiree" respondents said that they would return to work once retired to keep mentally fit while 59% said it would be tied to making ends meet.

youdao

It's the phosphate and the pentose that make up the backbone - that make up the upright struts of the ladder and it's the bases that make up the connecting struts, so the bases are the colors.

磷酸基和戊糖,共同构成了主链,主链又构成了梯子上下的支柱,而碱基,则构成连接支柱的梯阶,碱基是用各种颜色表示的

耶鲁公开课 - 生物医学工程探索课程节选