Tiedown
n. 系緊（栓系）
??? 情景例句
Thank you for everything.
一切謝謝你。
What do you like to do in your spare time?
空閑時你喜歡干什么？
it is extremely difficult to estimate the true value of the services which people perform for us.
但要估算別人為我們為所提供的服務的價值卻是極其困難的。