Throw doubt upon
产生怀疑
🧩 词语组成解析
throw
[θro]
vi. 投掷;丢;抛;
n. 投掷的距离;丢;
vt. 掷（色子）;抛;猛动（头、臂、腿）;使处于，使限于;
upon
[ə'pɑn]
prep. 在…上面;当…时候;
🗣️ 情景例句
At any rate, we must go there.
不管怎么样，我们非去那里一趟不可。
The doctor says that I should take quinine.
医生说我应该服用奎宁。
Walking up and down the stairs would beat any exercise machine.
上下楼梯可比什么健身器都要好。