safe adj. protected from danger and harm; secure; cautious安全的；平安的；谨慎的
词组 return safe and sound 平安无事
展开 safety n. 平安；安全 safety rules; take someone to safety;
sake n. because of; benefit 缘故；利益
词组 for one’s own sake 为了自己的利益。
for the sake of 由于…的缘故，为了…
satisfy vt. give what he wants, demands or needs; make contented
使满意；满足
